[2026-03-30 00:30:04] [DB_QUERY_ERROR] MSG: Unknown column 'co.use_yn' in 'where clause' | SQL:  SELECT COUNT(DISTINCT co.course_id) AS c FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 1 AND co.course_type = 'free' | IP: 51.222.168.74
[2026-03-30 00:30:04] [DB_QUERY_ERROR] MSG: Unknown column 'co.course_type' in 'field list' | SQL:  SELECT co.course_id, co.course_title, co.course_summary, co.thumb_image, co.course_type, co.price_sale, co.total_time, co.content_count, co.pass_min_progress, co.created_at, ca.category_name, COUNT(DISTINCT e.enroll_id) AS enroll_cnt FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id LEFT JOIN lms_class cl ON cl.course_id = co.course_id AND cl.del_yn='N' LEFT JOIN lms_enrollment e ON e.class_id = cl.class_id AND e.del_yn='N' WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 1 AND co.course_type = 'free' GROUP BY co.course_id ORDER BY co.course_title ASC LIMIT 0, 12 | IP: 51.222.168.74
[2026-03-30 00:57:53] [DB_QUERY_ERROR] MSG: Unknown column 'co.use_yn' in 'where clause' | SQL:  SELECT COUNT(DISTINCT co.course_id) AS c FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 10 AND co.course_type = 'free' | IP: 54.39.203.243
[2026-03-30 00:57:53] [DB_QUERY_ERROR] MSG: Unknown column 'co.course_type' in 'field list' | SQL:  SELECT co.course_id, co.course_title, co.course_summary, co.thumb_image, co.course_type, co.price_sale, co.total_time, co.content_count, co.pass_min_progress, co.created_at, ca.category_name, COUNT(DISTINCT e.enroll_id) AS enroll_cnt FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id LEFT JOIN lms_class cl ON cl.course_id = co.course_id AND cl.del_yn='N' LEFT JOIN lms_enrollment e ON e.class_id = cl.class_id AND e.del_yn='N' WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 10 AND co.course_type = 'free' GROUP BY co.course_id ORDER BY co.course_title ASC LIMIT 0, 12 | IP: 54.39.203.243
[2026-03-30 01:25:57] [DB_QUERY_ERROR] MSG: Unknown column 'co.use_yn' in 'where clause' | SQL:  SELECT COUNT(DISTINCT co.course_id) AS c FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 2 AND co.course_type = 'free' | IP: 51.222.95.113
[2026-03-30 01:25:57] [DB_QUERY_ERROR] MSG: Unknown column 'co.course_type' in 'field list' | SQL:  SELECT co.course_id, co.course_title, co.course_summary, co.thumb_image, co.course_type, co.price_sale, co.total_time, co.content_count, co.pass_min_progress, co.created_at, ca.category_name, COUNT(DISTINCT e.enroll_id) AS enroll_cnt FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id LEFT JOIN lms_class cl ON cl.course_id = co.course_id AND cl.del_yn='N' LEFT JOIN lms_enrollment e ON e.class_id = cl.class_id AND e.del_yn='N' WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 2 AND co.course_type = 'free' GROUP BY co.course_id ORDER BY co.course_title ASC LIMIT 0, 12 | IP: 51.222.95.113
[2026-03-30 01:51:30] [DB_QUERY_ERROR] MSG: Unknown column 'co.use_yn' in 'where clause' | SQL:  SELECT COUNT(DISTINCT co.course_id) AS c FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 3 AND co.course_type = 'free' | IP: 142.44.225.192
[2026-03-30 01:51:30] [DB_QUERY_ERROR] MSG: Unknown column 'co.course_type' in 'field list' | SQL:  SELECT co.course_id, co.course_title, co.course_summary, co.thumb_image, co.course_type, co.price_sale, co.total_time, co.content_count, co.pass_min_progress, co.created_at, ca.category_name, COUNT(DISTINCT e.enroll_id) AS enroll_cnt FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id LEFT JOIN lms_class cl ON cl.course_id = co.course_id AND cl.del_yn='N' LEFT JOIN lms_enrollment e ON e.class_id = cl.class_id AND e.del_yn='N' WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 3 AND co.course_type = 'free' GROUP BY co.course_id ORDER BY co.course_title ASC LIMIT 0, 12 | IP: 142.44.225.192
[2026-03-30 02:33:56] [DB_QUERY_ERROR] MSG: Unknown column 'co.use_yn' in 'where clause' | SQL:  SELECT COUNT(DISTINCT co.course_id) AS c FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 4 AND co.course_type = 'free' | IP: 51.161.37.70
[2026-03-30 02:33:56] [DB_QUERY_ERROR] MSG: Unknown column 'co.course_type' in 'field list' | SQL:  SELECT co.course_id, co.course_title, co.course_summary, co.thumb_image, co.course_type, co.price_sale, co.total_time, co.content_count, co.pass_min_progress, co.created_at, ca.category_name, COUNT(DISTINCT e.enroll_id) AS enroll_cnt FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id LEFT JOIN lms_class cl ON cl.course_id = co.course_id AND cl.del_yn='N' LEFT JOIN lms_enrollment e ON e.class_id = cl.class_id AND e.del_yn='N' WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 4 AND co.course_type = 'free' GROUP BY co.course_id ORDER BY co.course_title ASC LIMIT 0, 12 | IP: 51.161.37.70
[2026-03-30 02:49:05] [DB_QUERY_ERROR] MSG: Unknown column 'co.use_yn' in 'where clause' | SQL:  SELECT COUNT(DISTINCT co.course_id) AS c FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 5 AND co.course_type = 'free' | IP: 148.113.128.50
[2026-03-30 02:49:05] [DB_QUERY_ERROR] MSG: Unknown column 'co.course_type' in 'field list' | SQL:  SELECT co.course_id, co.course_title, co.course_summary, co.thumb_image, co.course_type, co.price_sale, co.total_time, co.content_count, co.pass_min_progress, co.created_at, ca.category_name, COUNT(DISTINCT e.enroll_id) AS enroll_cnt FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id LEFT JOIN lms_class cl ON cl.course_id = co.course_id AND cl.del_yn='N' LEFT JOIN lms_enrollment e ON e.class_id = cl.class_id AND e.del_yn='N' WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 5 AND co.course_type = 'free' GROUP BY co.course_id ORDER BY co.course_title ASC LIMIT 0, 12 | IP: 148.113.128.50
[2026-03-30 03:04:29] [DB_QUERY_ERROR] MSG: Unknown column 'co.use_yn' in 'where clause' | SQL:  SELECT COUNT(DISTINCT co.course_id) AS c FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 6 AND co.course_type = 'free' | IP: 54.39.0.58
[2026-03-30 03:04:29] [DB_QUERY_ERROR] MSG: Unknown column 'co.course_type' in 'field list' | SQL:  SELECT co.course_id, co.course_title, co.course_summary, co.thumb_image, co.course_type, co.price_sale, co.total_time, co.content_count, co.pass_min_progress, co.created_at, ca.category_name, COUNT(DISTINCT e.enroll_id) AS enroll_cnt FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id LEFT JOIN lms_class cl ON cl.course_id = co.course_id AND cl.del_yn='N' LEFT JOIN lms_enrollment e ON e.class_id = cl.class_id AND e.del_yn='N' WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 6 AND co.course_type = 'free' GROUP BY co.course_id ORDER BY co.course_title ASC LIMIT 0, 12 | IP: 54.39.0.58
[2026-03-30 03:18:13] [DB_QUERY_ERROR] MSG: Unknown column 'co.use_yn' in 'where clause' | SQL:  SELECT COUNT(DISTINCT co.course_id) AS c FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 7 AND co.course_type = 'free' | IP: 51.222.168.117
[2026-03-30 03:18:13] [DB_QUERY_ERROR] MSG: Unknown column 'co.course_type' in 'field list' | SQL:  SELECT co.course_id, co.course_title, co.course_summary, co.thumb_image, co.course_type, co.price_sale, co.total_time, co.content_count, co.pass_min_progress, co.created_at, ca.category_name, COUNT(DISTINCT e.enroll_id) AS enroll_cnt FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id LEFT JOIN lms_class cl ON cl.course_id = co.course_id AND cl.del_yn='N' LEFT JOIN lms_enrollment e ON e.class_id = cl.class_id AND e.del_yn='N' WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 7 AND co.course_type = 'free' GROUP BY co.course_id ORDER BY co.course_title ASC LIMIT 0, 12 | IP: 51.222.168.117
[2026-03-30 03:20:17] [DB_QUERY_ERROR] MSG: Unknown column 'co.use_yn' in 'where clause' | SQL:  SELECT COUNT(DISTINCT co.course_id) AS c FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id WHERE co.use_yn='Y' AND co.del_yn='N' | IP: 66.132.172.133
[2026-03-30 03:20:17] [DB_QUERY_ERROR] MSG: Unknown column 'co.course_type' in 'field list' | SQL:  SELECT co.course_id, co.course_title, co.course_summary, co.thumb_image, co.course_type, co.price_sale, co.total_time, co.content_count, co.pass_min_progress, co.created_at, ca.category_name, COUNT(DISTINCT e.enroll_id) AS enroll_cnt FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id LEFT JOIN lms_class cl ON cl.course_id = co.course_id AND cl.del_yn='N' LEFT JOIN lms_enrollment e ON e.class_id = cl.class_id AND e.del_yn='N' WHERE co.use_yn='Y' AND co.del_yn='N' GROUP BY co.course_id ORDER BY enroll_cnt DESC, co.created_at DESC LIMIT 0, 12 | IP: 66.132.172.133
[2026-03-30 03:25:17] [DB_QUERY_ERROR] MSG: Unknown column 'co.use_yn' in 'where clause' | SQL:  SELECT COUNT(DISTINCT co.course_id) AS c FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 9 AND co.course_type = 'free' | IP: 51.161.37.43
[2026-03-30 03:25:17] [DB_QUERY_ERROR] MSG: Unknown column 'co.course_type' in 'field list' | SQL:  SELECT co.course_id, co.course_title, co.course_summary, co.thumb_image, co.course_type, co.price_sale, co.total_time, co.content_count, co.pass_min_progress, co.created_at, ca.category_name, COUNT(DISTINCT e.enroll_id) AS enroll_cnt FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id LEFT JOIN lms_class cl ON cl.course_id = co.course_id AND cl.del_yn='N' LEFT JOIN lms_enrollment e ON e.class_id = cl.class_id AND e.del_yn='N' WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 9 AND co.course_type = 'free' GROUP BY co.course_id ORDER BY co.course_title ASC LIMIT 0, 12 | IP: 51.161.37.43
[2026-03-30 03:28:42] [DB_QUERY_ERROR] MSG: Unknown column 'co.use_yn' in 'where clause' | SQL:  SELECT COUNT(DISTINCT co.course_id) AS c FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id WHERE co.use_yn='Y' AND co.del_yn='N' AND co.course_type = 'free' | IP: 54.39.0.29
[2026-03-30 03:28:42] [DB_QUERY_ERROR] MSG: Unknown column 'co.course_type' in 'field list' | SQL:  SELECT co.course_id, co.course_title, co.course_summary, co.thumb_image, co.course_type, co.price_sale, co.total_time, co.content_count, co.pass_min_progress, co.created_at, ca.category_name, COUNT(DISTINCT e.enroll_id) AS enroll_cnt FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id LEFT JOIN lms_class cl ON cl.course_id = co.course_id AND cl.del_yn='N' LEFT JOIN lms_enrollment e ON e.class_id = cl.class_id AND e.del_yn='N' WHERE co.use_yn='Y' AND co.del_yn='N' AND co.course_type = 'free' GROUP BY co.course_id ORDER BY co.course_title ASC LIMIT 0, 12 | IP: 54.39.0.29
[2026-03-30 03:32:15] [DB_QUERY_ERROR] MSG: Unknown column 'co.use_yn' in 'where clause' | SQL:  SELECT COUNT(DISTINCT co.course_id) AS c FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 3 AND co.course_type = 'paid' | IP: 142.44.228.41
[2026-03-30 03:32:15] [DB_QUERY_ERROR] MSG: Unknown column 'co.course_type' in 'field list' | SQL:  SELECT co.course_id, co.course_title, co.course_summary, co.thumb_image, co.course_type, co.price_sale, co.total_time, co.content_count, co.pass_min_progress, co.created_at, ca.category_name, COUNT(DISTINCT e.enroll_id) AS enroll_cnt FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id LEFT JOIN lms_class cl ON cl.course_id = co.course_id AND cl.del_yn='N' LEFT JOIN lms_enrollment e ON e.class_id = cl.class_id AND e.del_yn='N' WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 3 AND co.course_type = 'paid' GROUP BY co.course_id ORDER BY co.created_at DESC LIMIT 0, 12 | IP: 142.44.228.41
[2026-03-30 03:36:04] [DB_QUERY_ERROR] MSG: Unknown column 'co.use_yn' in 'where clause' | SQL:  SELECT COUNT(DISTINCT co.course_id) AS c FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 1 AND co.course_type = 'paid' | IP: 148.113.128.43
[2026-03-30 03:36:04] [DB_QUERY_ERROR] MSG: Unknown column 'co.course_type' in 'field list' | SQL:  SELECT co.course_id, co.course_title, co.course_summary, co.thumb_image, co.course_type, co.price_sale, co.total_time, co.content_count, co.pass_min_progress, co.created_at, ca.category_name, COUNT(DISTINCT e.enroll_id) AS enroll_cnt FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id LEFT JOIN lms_class cl ON cl.course_id = co.course_id AND cl.del_yn='N' LEFT JOIN lms_enrollment e ON e.class_id = cl.class_id AND e.del_yn='N' WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 1 AND co.course_type = 'paid' GROUP BY co.course_id ORDER BY co.course_title ASC LIMIT 0, 12 | IP: 148.113.128.43
[2026-03-30 03:40:09] [DB_QUERY_ERROR] MSG: Unknown column 'co.use_yn' in 'where clause' | SQL:  SELECT COUNT(DISTINCT co.course_id) AS c FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 1 AND co.course_type = 'corporate' | IP: 51.161.37.83
[2026-03-30 03:40:09] [DB_QUERY_ERROR] MSG: Unknown column 'co.course_type' in 'field list' | SQL:  SELECT co.course_id, co.course_title, co.course_summary, co.thumb_image, co.course_type, co.price_sale, co.total_time, co.content_count, co.pass_min_progress, co.created_at, ca.category_name, COUNT(DISTINCT e.enroll_id) AS enroll_cnt FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id LEFT JOIN lms_class cl ON cl.course_id = co.course_id AND cl.del_yn='N' LEFT JOIN lms_enrollment e ON e.class_id = cl.class_id AND e.del_yn='N' WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 1 AND co.course_type = 'corporate' GROUP BY co.course_id ORDER BY co.course_title ASC LIMIT 0, 12 | IP: 51.161.37.83
[2026-03-30 03:44:58] [DB_QUERY_ERROR] MSG: Unknown column 'co.use_yn' in 'where clause' | SQL:  SELECT COUNT(DISTINCT co.course_id) AS c FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 10 AND co.course_type = 'paid' | IP: 142.44.225.250
[2026-03-30 03:44:58] [DB_QUERY_ERROR] MSG: Unknown column 'co.course_type' in 'field list' | SQL:  SELECT co.course_id, co.course_title, co.course_summary, co.thumb_image, co.course_type, co.price_sale, co.total_time, co.content_count, co.pass_min_progress, co.created_at, ca.category_name, COUNT(DISTINCT e.enroll_id) AS enroll_cnt FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id LEFT JOIN lms_class cl ON cl.course_id = co.course_id AND cl.del_yn='N' LEFT JOIN lms_enrollment e ON e.class_id = cl.class_id AND e.del_yn='N' WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 10 AND co.course_type = 'paid' GROUP BY co.course_id ORDER BY co.course_title ASC LIMIT 0, 12 | IP: 142.44.225.250
[2026-03-30 03:45:52] [DB_QUERY_ERROR] MSG: Unknown column 'co.use_yn' in 'where clause' | SQL:  SELECT COUNT(DISTINCT co.course_id) AS c FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id WHERE co.use_yn='Y' AND co.del_yn='N' | IP: 66.132.172.104
[2026-03-30 03:45:52] [DB_QUERY_ERROR] MSG: Unknown column 'co.course_type' in 'field list' | SQL:  SELECT co.course_id, co.course_title, co.course_summary, co.thumb_image, co.course_type, co.price_sale, co.total_time, co.content_count, co.pass_min_progress, co.created_at, ca.category_name, COUNT(DISTINCT e.enroll_id) AS enroll_cnt FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id LEFT JOIN lms_class cl ON cl.course_id = co.course_id AND cl.del_yn='N' LEFT JOIN lms_enrollment e ON e.class_id = cl.class_id AND e.del_yn='N' WHERE co.use_yn='Y' AND co.del_yn='N' GROUP BY co.course_id ORDER BY enroll_cnt DESC, co.created_at DESC LIMIT 0, 12 | IP: 66.132.172.104
[2026-03-30 03:52:11] [DB_QUERY_ERROR] MSG: Unknown column 'co.use_yn' in 'where clause' | SQL:  SELECT COUNT(DISTINCT co.course_id) AS c FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 10 AND co.course_type = 'corporate' | IP: 54.39.203.197
[2026-03-30 03:52:11] [DB_QUERY_ERROR] MSG: Unknown column 'co.course_type' in 'field list' | SQL:  SELECT co.course_id, co.course_title, co.course_summary, co.thumb_image, co.course_type, co.price_sale, co.total_time, co.content_count, co.pass_min_progress, co.created_at, ca.category_name, COUNT(DISTINCT e.enroll_id) AS enroll_cnt FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id LEFT JOIN lms_class cl ON cl.course_id = co.course_id AND cl.del_yn='N' LEFT JOIN lms_enrollment e ON e.class_id = cl.class_id AND e.del_yn='N' WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 10 AND co.course_type = 'corporate' GROUP BY co.course_id ORDER BY co.course_title ASC LIMIT 0, 12 | IP: 54.39.203.197
[2026-03-30 03:57:49] [DB_QUERY_ERROR] MSG: Unknown column 'co.use_yn' in 'where clause' | SQL:  SELECT COUNT(DISTINCT co.course_id) AS c FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 2 AND co.course_type = 'paid' | IP: 148.113.130.179
[2026-03-30 03:57:49] [DB_QUERY_ERROR] MSG: Unknown column 'co.course_type' in 'field list' | SQL:  SELECT co.course_id, co.course_title, co.course_summary, co.thumb_image, co.course_type, co.price_sale, co.total_time, co.content_count, co.pass_min_progress, co.created_at, ca.category_name, COUNT(DISTINCT e.enroll_id) AS enroll_cnt FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id LEFT JOIN lms_class cl ON cl.course_id = co.course_id AND cl.del_yn='N' LEFT JOIN lms_enrollment e ON e.class_id = cl.class_id AND e.del_yn='N' WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 2 AND co.course_type = 'paid' GROUP BY co.course_id ORDER BY co.course_title ASC LIMIT 0, 12 | IP: 148.113.130.179
[2026-03-30 04:02:35] [DB_QUERY_ERROR] MSG: Unknown column 'co.use_yn' in 'where clause' | SQL:  SELECT COUNT(DISTINCT co.course_id) AS c FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 2 AND co.course_type = 'corporate' | IP: 142.44.225.109
[2026-03-30 04:02:35] [DB_QUERY_ERROR] MSG: Unknown column 'co.course_type' in 'field list' | SQL:  SELECT co.course_id, co.course_title, co.course_summary, co.thumb_image, co.course_type, co.price_sale, co.total_time, co.content_count, co.pass_min_progress, co.created_at, ca.category_name, COUNT(DISTINCT e.enroll_id) AS enroll_cnt FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id LEFT JOIN lms_class cl ON cl.course_id = co.course_id AND cl.del_yn='N' LEFT JOIN lms_enrollment e ON e.class_id = cl.class_id AND e.del_yn='N' WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 2 AND co.course_type = 'corporate' GROUP BY co.course_id ORDER BY co.course_title ASC LIMIT 0, 12 | IP: 142.44.225.109
[2026-03-30 04:06:59] [DB_QUERY_ERROR] MSG: Unknown column 'co.use_yn' in 'where clause' | SQL:  SELECT COUNT(DISTINCT co.course_id) AS c FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 3 AND co.course_type = 'paid' | IP: 148.113.128.154
[2026-03-30 04:06:59] [DB_QUERY_ERROR] MSG: Unknown column 'co.course_type' in 'field list' | SQL:  SELECT co.course_id, co.course_title, co.course_summary, co.thumb_image, co.course_type, co.price_sale, co.total_time, co.content_count, co.pass_min_progress, co.created_at, ca.category_name, COUNT(DISTINCT e.enroll_id) AS enroll_cnt FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id LEFT JOIN lms_class cl ON cl.course_id = co.course_id AND cl.del_yn='N' LEFT JOIN lms_enrollment e ON e.class_id = cl.class_id AND e.del_yn='N' WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 3 AND co.course_type = 'paid' GROUP BY co.course_id ORDER BY co.course_title ASC LIMIT 0, 12 | IP: 148.113.128.154
[2026-03-30 04:11:24] [DB_QUERY_ERROR] MSG: Unknown column 'co.use_yn' in 'where clause' | SQL:  SELECT COUNT(DISTINCT co.course_id) AS c FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 3 AND co.course_type = 'corporate' | IP: 142.44.225.199
[2026-03-30 04:11:24] [DB_QUERY_ERROR] MSG: Unknown column 'co.course_type' in 'field list' | SQL:  SELECT co.course_id, co.course_title, co.course_summary, co.thumb_image, co.course_type, co.price_sale, co.total_time, co.content_count, co.pass_min_progress, co.created_at, ca.category_name, COUNT(DISTINCT e.enroll_id) AS enroll_cnt FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id LEFT JOIN lms_class cl ON cl.course_id = co.course_id AND cl.del_yn='N' LEFT JOIN lms_enrollment e ON e.class_id = cl.class_id AND e.del_yn='N' WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 3 AND co.course_type = 'corporate' GROUP BY co.course_id ORDER BY co.course_title ASC LIMIT 0, 12 | IP: 142.44.225.199
[2026-03-30 04:15:10] [DB_QUERY_ERROR] MSG: Unknown column 'co.use_yn' in 'where clause' | SQL:  SELECT COUNT(DISTINCT co.course_id) AS c FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id WHERE co.use_yn='Y' AND co.del_yn='N' | IP: 47.128.52.84
[2026-03-30 04:15:10] [DB_QUERY_ERROR] MSG: Unknown column 'co.course_type' in 'field list' | SQL:  SELECT co.course_id, co.course_title, co.course_summary, co.thumb_image, co.course_type, co.price_sale, co.total_time, co.content_count, co.pass_min_progress, co.created_at, ca.category_name, COUNT(DISTINCT e.enroll_id) AS enroll_cnt FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id LEFT JOIN lms_class cl ON cl.course_id = co.course_id AND cl.del_yn='N' LEFT JOIN lms_enrollment e ON e.class_id = cl.class_id AND e.del_yn='N' WHERE co.use_yn='Y' AND co.del_yn='N' GROUP BY co.course_id ORDER BY enroll_cnt DESC, co.created_at DESC LIMIT 0, 12 | IP: 47.128.52.84
[2026-03-30 04:15:32] [DB_QUERY_ERROR] MSG: Unknown column 'co.use_yn' in 'where clause' | SQL:  SELECT COUNT(DISTINCT co.course_id) AS c FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 4 AND co.course_type = 'paid' | IP: 15.235.27.161
[2026-03-30 04:15:32] [DB_QUERY_ERROR] MSG: Unknown column 'co.course_type' in 'field list' | SQL:  SELECT co.course_id, co.course_title, co.course_summary, co.thumb_image, co.course_type, co.price_sale, co.total_time, co.content_count, co.pass_min_progress, co.created_at, ca.category_name, COUNT(DISTINCT e.enroll_id) AS enroll_cnt FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id LEFT JOIN lms_class cl ON cl.course_id = co.course_id AND cl.del_yn='N' LEFT JOIN lms_enrollment e ON e.class_id = cl.class_id AND e.del_yn='N' WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 4 AND co.course_type = 'paid' GROUP BY co.course_id ORDER BY co.course_title ASC LIMIT 0, 12 | IP: 15.235.27.161
[2026-03-30 04:19:55] [DB_QUERY_ERROR] MSG: Unknown column 'co.use_yn' in 'where clause' | SQL:  SELECT COUNT(DISTINCT co.course_id) AS c FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 4 AND co.course_type = 'corporate' | IP: 51.161.65.72
[2026-03-30 04:19:55] [DB_QUERY_ERROR] MSG: Unknown column 'co.course_type' in 'field list' | SQL:  SELECT co.course_id, co.course_title, co.course_summary, co.thumb_image, co.course_type, co.price_sale, co.total_time, co.content_count, co.pass_min_progress, co.created_at, ca.category_name, COUNT(DISTINCT e.enroll_id) AS enroll_cnt FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id LEFT JOIN lms_class cl ON cl.course_id = co.course_id AND cl.del_yn='N' LEFT JOIN lms_enrollment e ON e.class_id = cl.class_id AND e.del_yn='N' WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 4 AND co.course_type = 'corporate' GROUP BY co.course_id ORDER BY co.course_title ASC LIMIT 0, 12 | IP: 51.161.65.72
[2026-03-30 04:24:01] [DB_QUERY_ERROR] MSG: Unknown column 'co.use_yn' in 'where clause' | SQL:  SELECT COUNT(DISTINCT co.course_id) AS c FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 5 AND co.course_type = 'paid' | IP: 51.222.168.23
[2026-03-30 04:24:01] [DB_QUERY_ERROR] MSG: Unknown column 'co.course_type' in 'field list' | SQL:  SELECT co.course_id, co.course_title, co.course_summary, co.thumb_image, co.course_type, co.price_sale, co.total_time, co.content_count, co.pass_min_progress, co.created_at, ca.category_name, COUNT(DISTINCT e.enroll_id) AS enroll_cnt FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id LEFT JOIN lms_class cl ON cl.course_id = co.course_id AND cl.del_yn='N' LEFT JOIN lms_enrollment e ON e.class_id = cl.class_id AND e.del_yn='N' WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 5 AND co.course_type = 'paid' GROUP BY co.course_id ORDER BY co.course_title ASC LIMIT 0, 12 | IP: 51.222.168.23
[2026-03-30 04:27:51] [DB_QUERY_ERROR] MSG: Unknown column 'co.use_yn' in 'where clause' | SQL:  SELECT COUNT(DISTINCT co.course_id) AS c FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 5 AND co.course_type = 'corporate' | IP: 148.113.130.8
[2026-03-30 04:27:51] [DB_QUERY_ERROR] MSG: Unknown column 'co.course_type' in 'field list' | SQL:  SELECT co.course_id, co.course_title, co.course_summary, co.thumb_image, co.course_type, co.price_sale, co.total_time, co.content_count, co.pass_min_progress, co.created_at, ca.category_name, COUNT(DISTINCT e.enroll_id) AS enroll_cnt FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id LEFT JOIN lms_class cl ON cl.course_id = co.course_id AND cl.del_yn='N' LEFT JOIN lms_enrollment e ON e.class_id = cl.class_id AND e.del_yn='N' WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 5 AND co.course_type = 'corporate' GROUP BY co.course_id ORDER BY co.course_title ASC LIMIT 0, 12 | IP: 148.113.130.8
[2026-03-30 04:31:34] [DB_QUERY_ERROR] MSG: Unknown column 'co.use_yn' in 'where clause' | SQL:  SELECT COUNT(DISTINCT co.course_id) AS c FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 6 AND co.course_type = 'paid' | IP: 142.44.228.56
[2026-03-30 04:31:34] [DB_QUERY_ERROR] MSG: Unknown column 'co.course_type' in 'field list' | SQL:  SELECT co.course_id, co.course_title, co.course_summary, co.thumb_image, co.course_type, co.price_sale, co.total_time, co.content_count, co.pass_min_progress, co.created_at, ca.category_name, COUNT(DISTINCT e.enroll_id) AS enroll_cnt FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id LEFT JOIN lms_class cl ON cl.course_id = co.course_id AND cl.del_yn='N' LEFT JOIN lms_enrollment e ON e.class_id = cl.class_id AND e.del_yn='N' WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 6 AND co.course_type = 'paid' GROUP BY co.course_id ORDER BY co.course_title ASC LIMIT 0, 12 | IP: 142.44.228.56
[2026-03-30 04:35:22] [DB_QUERY_ERROR] MSG: Unknown column 'co.use_yn' in 'where clause' | SQL:  SELECT COUNT(DISTINCT co.course_id) AS c FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 6 AND co.course_type = 'corporate' | IP: 142.44.225.209
[2026-03-30 04:35:22] [DB_QUERY_ERROR] MSG: Unknown column 'co.course_type' in 'field list' | SQL:  SELECT co.course_id, co.course_title, co.course_summary, co.thumb_image, co.course_type, co.price_sale, co.total_time, co.content_count, co.pass_min_progress, co.created_at, ca.category_name, COUNT(DISTINCT e.enroll_id) AS enroll_cnt FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id LEFT JOIN lms_class cl ON cl.course_id = co.course_id AND cl.del_yn='N' LEFT JOIN lms_enrollment e ON e.class_id = cl.class_id AND e.del_yn='N' WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 6 AND co.course_type = 'corporate' GROUP BY co.course_id ORDER BY co.course_title ASC LIMIT 0, 12 | IP: 142.44.225.209
[2026-03-30 04:39:03] [DB_QUERY_ERROR] MSG: Unknown column 'co.use_yn' in 'where clause' | SQL:  SELECT COUNT(DISTINCT co.course_id) AS c FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 8 AND co.course_type = 'paid' | IP: 54.39.89.83
[2026-03-30 04:39:03] [DB_QUERY_ERROR] MSG: Unknown column 'co.course_type' in 'field list' | SQL:  SELECT co.course_id, co.course_title, co.course_summary, co.thumb_image, co.course_type, co.price_sale, co.total_time, co.content_count, co.pass_min_progress, co.created_at, ca.category_name, COUNT(DISTINCT e.enroll_id) AS enroll_cnt FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id LEFT JOIN lms_class cl ON cl.course_id = co.course_id AND cl.del_yn='N' LEFT JOIN lms_enrollment e ON e.class_id = cl.class_id AND e.del_yn='N' WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 8 AND co.course_type = 'paid' GROUP BY co.course_id ORDER BY co.created_at DESC LIMIT 0, 12 | IP: 54.39.89.83
[2026-03-30 04:43:02] [DB_QUERY_ERROR] MSG: Unknown column 'co.use_yn' in 'where clause' | SQL:  SELECT COUNT(DISTINCT co.course_id) AS c FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 8 AND co.course_type = 'free' | IP: 51.161.37.152
[2026-03-30 04:43:02] [DB_QUERY_ERROR] MSG: Unknown column 'co.course_type' in 'field list' | SQL:  SELECT co.course_id, co.course_title, co.course_summary, co.thumb_image, co.course_type, co.price_sale, co.total_time, co.content_count, co.pass_min_progress, co.created_at, ca.category_name, COUNT(DISTINCT e.enroll_id) AS enroll_cnt FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id LEFT JOIN lms_class cl ON cl.course_id = co.course_id AND cl.del_yn='N' LEFT JOIN lms_enrollment e ON e.class_id = cl.class_id AND e.del_yn='N' WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 8 AND co.course_type = 'free' GROUP BY co.course_id ORDER BY co.created_at DESC LIMIT 0, 12 | IP: 51.161.37.152
[2026-03-30 04:46:51] [DB_QUERY_ERROR] MSG: Unknown column 'co.use_yn' in 'where clause' | SQL:  SELECT COUNT(DISTINCT co.course_id) AS c FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 8 AND co.course_type = 'corporate' | IP: 142.44.233.240
[2026-03-30 04:46:51] [DB_QUERY_ERROR] MSG: Unknown column 'co.course_type' in 'field list' | SQL:  SELECT co.course_id, co.course_title, co.course_summary, co.thumb_image, co.course_type, co.price_sale, co.total_time, co.content_count, co.pass_min_progress, co.created_at, ca.category_name, COUNT(DISTINCT e.enroll_id) AS enroll_cnt FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id LEFT JOIN lms_class cl ON cl.course_id = co.course_id AND cl.del_yn='N' LEFT JOIN lms_enrollment e ON e.class_id = cl.class_id AND e.del_yn='N' WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 8 AND co.course_type = 'corporate' GROUP BY co.course_id ORDER BY co.created_at DESC LIMIT 0, 12 | IP: 142.44.233.240
[2026-03-30 04:50:49] [DB_QUERY_ERROR] MSG: Unknown column 'co.use_yn' in 'where clause' | SQL:  SELECT COUNT(DISTINCT co.course_id) AS c FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 8 AND co.course_type = 'free' | IP: 51.222.95.23
[2026-03-30 04:50:49] [DB_QUERY_ERROR] MSG: Unknown column 'co.course_type' in 'field list' | SQL:  SELECT co.course_id, co.course_title, co.course_summary, co.thumb_image, co.course_type, co.price_sale, co.total_time, co.content_count, co.pass_min_progress, co.created_at, ca.category_name, COUNT(DISTINCT e.enroll_id) AS enroll_cnt FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id LEFT JOIN lms_class cl ON cl.course_id = co.course_id AND cl.del_yn='N' LEFT JOIN lms_enrollment e ON e.class_id = cl.class_id AND e.del_yn='N' WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 8 AND co.course_type = 'free' GROUP BY co.course_id ORDER BY enroll_cnt DESC, co.created_at DESC LIMIT 0, 12 | IP: 51.222.95.23
[2026-03-30 04:54:46] [DB_QUERY_ERROR] MSG: Unknown column 'co.use_yn' in 'where clause' | SQL:  SELECT COUNT(DISTINCT co.course_id) AS c FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 8 AND co.course_type = 'free' | IP: 15.235.96.248
[2026-03-30 04:54:46] [DB_QUERY_ERROR] MSG: Unknown column 'co.course_type' in 'field list' | SQL:  SELECT co.course_id, co.course_title, co.course_summary, co.thumb_image, co.course_type, co.price_sale, co.total_time, co.content_count, co.pass_min_progress, co.created_at, ca.category_name, COUNT(DISTINCT e.enroll_id) AS enroll_cnt FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id LEFT JOIN lms_class cl ON cl.course_id = co.course_id AND cl.del_yn='N' LEFT JOIN lms_enrollment e ON e.class_id = cl.class_id AND e.del_yn='N' WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 8 AND co.course_type = 'free' GROUP BY co.course_id ORDER BY co.created_at DESC LIMIT 0, 12 | IP: 15.235.96.248
[2026-03-30 05:02:30] [DB_QUERY_ERROR] MSG: Unknown column 'co.use_yn' in 'where clause' | SQL:  SELECT COUNT(DISTINCT co.course_id) AS c FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 8 AND co.course_type = 'paid' | IP: 54.39.89.39
[2026-03-30 05:02:30] [DB_QUERY_ERROR] MSG: Unknown column 'co.course_type' in 'field list' | SQL:  SELECT co.course_id, co.course_title, co.course_summary, co.thumb_image, co.course_type, co.price_sale, co.total_time, co.content_count, co.pass_min_progress, co.created_at, ca.category_name, COUNT(DISTINCT e.enroll_id) AS enroll_cnt FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id LEFT JOIN lms_class cl ON cl.course_id = co.course_id AND cl.del_yn='N' LEFT JOIN lms_enrollment e ON e.class_id = cl.class_id AND e.del_yn='N' WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 8 AND co.course_type = 'paid' GROUP BY co.course_id ORDER BY co.course_title ASC LIMIT 0, 12 | IP: 54.39.89.39
[2026-03-30 05:17:51] [DB_QUERY_ERROR] MSG: Unknown column 'co.use_yn' in 'where clause' | SQL:  SELECT COUNT(DISTINCT co.course_id) AS c FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 8 AND co.course_type = 'paid' | IP: 54.39.89.9
[2026-03-30 05:17:51] [DB_QUERY_ERROR] MSG: Unknown column 'co.course_type' in 'field list' | SQL:  SELECT co.course_id, co.course_title, co.course_summary, co.thumb_image, co.course_type, co.price_sale, co.total_time, co.content_count, co.pass_min_progress, co.created_at, ca.category_name, COUNT(DISTINCT e.enroll_id) AS enroll_cnt FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id LEFT JOIN lms_class cl ON cl.course_id = co.course_id AND cl.del_yn='N' LEFT JOIN lms_enrollment e ON e.class_id = cl.class_id AND e.del_yn='N' WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 8 AND co.course_type = 'paid' GROUP BY co.course_id ORDER BY enroll_cnt DESC, co.created_at DESC LIMIT 0, 12 | IP: 54.39.89.9
[2026-03-30 05:51:01] [DB_QUERY_ERROR] MSG: Unknown column 'co.use_yn' in 'where clause' | SQL:  SELECT COUNT(DISTINCT co.course_id) AS c FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 7 AND co.course_type = 'paid' | IP: 54.39.203.53
[2026-03-30 05:51:01] [DB_QUERY_ERROR] MSG: Unknown column 'co.course_type' in 'field list' | SQL:  SELECT co.course_id, co.course_title, co.course_summary, co.thumb_image, co.course_type, co.price_sale, co.total_time, co.content_count, co.pass_min_progress, co.created_at, ca.category_name, COUNT(DISTINCT e.enroll_id) AS enroll_cnt FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id LEFT JOIN lms_class cl ON cl.course_id = co.course_id AND cl.del_yn='N' LEFT JOIN lms_enrollment e ON e.class_id = cl.class_id AND e.del_yn='N' WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 7 AND co.course_type = 'paid' GROUP BY co.course_id ORDER BY co.course_title ASC LIMIT 0, 12 | IP: 54.39.203.53
[2026-03-30 05:55:58] [DB_QUERY_ERROR] MSG: Unknown column 'co.use_yn' in 'where clause' | SQL:  SELECT COUNT(DISTINCT co.course_id) AS c FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id WHERE co.use_yn='Y' AND co.del_yn='N' | IP: 67.227.90.109
[2026-03-30 05:55:58] [DB_QUERY_ERROR] MSG: Unknown column 'co.course_type' in 'field list' | SQL:  SELECT co.course_id, co.course_title, co.course_summary, co.thumb_image, co.course_type, co.price_sale, co.total_time, co.content_count, co.pass_min_progress, co.created_at, ca.category_name, COUNT(DISTINCT e.enroll_id) AS enroll_cnt FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id LEFT JOIN lms_class cl ON cl.course_id = co.course_id AND cl.del_yn='N' LEFT JOIN lms_enrollment e ON e.class_id = cl.class_id AND e.del_yn='N' WHERE co.use_yn='Y' AND co.del_yn='N' GROUP BY co.course_id ORDER BY enroll_cnt DESC, co.created_at DESC LIMIT 0, 12 | IP: 67.227.90.109
[2026-03-30 06:53:38] [DB_QUERY_ERROR] MSG: Unknown column 'co.use_yn' in 'where clause' | SQL:  SELECT COUNT(DISTINCT co.course_id) AS c FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 7 AND co.course_type = 'corporate' | IP: 15.235.27.240
[2026-03-30 06:53:38] [DB_QUERY_ERROR] MSG: Unknown column 'co.course_type' in 'field list' | SQL:  SELECT co.course_id, co.course_title, co.course_summary, co.thumb_image, co.course_type, co.price_sale, co.total_time, co.content_count, co.pass_min_progress, co.created_at, ca.category_name, COUNT(DISTINCT e.enroll_id) AS enroll_cnt FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id LEFT JOIN lms_class cl ON cl.course_id = co.course_id AND cl.del_yn='N' LEFT JOIN lms_enrollment e ON e.class_id = cl.class_id AND e.del_yn='N' WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 7 AND co.course_type = 'corporate' GROUP BY co.course_id ORDER BY co.course_title ASC LIMIT 0, 12 | IP: 15.235.27.240
[2026-03-30 07:50:41] [DB_QUERY_ERROR] MSG: Unknown column 'co.use_yn' in 'where clause' | SQL:  SELECT COUNT(DISTINCT co.course_id) AS c FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 9 AND co.course_type = 'paid' | IP: 142.44.220.51
[2026-03-30 07:50:41] [DB_QUERY_ERROR] MSG: Unknown column 'co.course_type' in 'field list' | SQL:  SELECT co.course_id, co.course_title, co.course_summary, co.thumb_image, co.course_type, co.price_sale, co.total_time, co.content_count, co.pass_min_progress, co.created_at, ca.category_name, COUNT(DISTINCT e.enroll_id) AS enroll_cnt FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id LEFT JOIN lms_class cl ON cl.course_id = co.course_id AND cl.del_yn='N' LEFT JOIN lms_enrollment e ON e.class_id = cl.class_id AND e.del_yn='N' WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 9 AND co.course_type = 'paid' GROUP BY co.course_id ORDER BY co.course_title ASC LIMIT 0, 12 | IP: 142.44.220.51
[2026-03-30 09:27:12] [DB_QUERY_ERROR] MSG: Unknown column 'co.use_yn' in 'where clause' | SQL:  SELECT COUNT(DISTINCT co.course_id) AS c FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 9 AND co.course_type = 'corporate' | IP: 142.44.220.152
[2026-03-30 09:27:12] [DB_QUERY_ERROR] MSG: Unknown column 'co.course_type' in 'field list' | SQL:  SELECT co.course_id, co.course_title, co.course_summary, co.thumb_image, co.course_type, co.price_sale, co.total_time, co.content_count, co.pass_min_progress, co.created_at, ca.category_name, COUNT(DISTINCT e.enroll_id) AS enroll_cnt FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id LEFT JOIN lms_class cl ON cl.course_id = co.course_id AND cl.del_yn='N' LEFT JOIN lms_enrollment e ON e.class_id = cl.class_id AND e.del_yn='N' WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 9 AND co.course_type = 'corporate' GROUP BY co.course_id ORDER BY co.course_title ASC LIMIT 0, 12 | IP: 142.44.220.152
[2026-03-30 11:06:59] [DB_QUERY_ERROR] MSG: Unknown column 'co.use_yn' in 'where clause' | SQL:  SELECT COUNT(DISTINCT co.course_id) AS c FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id WHERE co.use_yn='Y' AND co.del_yn='N' AND co.course_type = 'paid' | IP: 142.44.233.126
[2026-03-30 11:06:59] [DB_QUERY_ERROR] MSG: Unknown column 'co.course_type' in 'field list' | SQL:  SELECT co.course_id, co.course_title, co.course_summary, co.thumb_image, co.course_type, co.price_sale, co.total_time, co.content_count, co.pass_min_progress, co.created_at, ca.category_name, COUNT(DISTINCT e.enroll_id) AS enroll_cnt FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id LEFT JOIN lms_class cl ON cl.course_id = co.course_id AND cl.del_yn='N' LEFT JOIN lms_enrollment e ON e.class_id = cl.class_id AND e.del_yn='N' WHERE co.use_yn='Y' AND co.del_yn='N' AND co.course_type = 'paid' GROUP BY co.course_id ORDER BY co.course_title ASC LIMIT 0, 12 | IP: 142.44.233.126
[2026-03-30 12:48:15] [DB_QUERY_ERROR] MSG: Unknown column 'co.use_yn' in 'where clause' | SQL:  SELECT COUNT(DISTINCT co.course_id) AS c FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id WHERE co.use_yn='Y' AND co.del_yn='N' AND co.course_type = 'corporate' | IP: 54.39.203.65
[2026-03-30 12:48:15] [DB_QUERY_ERROR] MSG: Unknown column 'co.course_type' in 'field list' | SQL:  SELECT co.course_id, co.course_title, co.course_summary, co.thumb_image, co.course_type, co.price_sale, co.total_time, co.content_count, co.pass_min_progress, co.created_at, ca.category_name, COUNT(DISTINCT e.enroll_id) AS enroll_cnt FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id LEFT JOIN lms_class cl ON cl.course_id = co.course_id AND cl.del_yn='N' LEFT JOIN lms_enrollment e ON e.class_id = cl.class_id AND e.del_yn='N' WHERE co.use_yn='Y' AND co.del_yn='N' AND co.course_type = 'corporate' GROUP BY co.course_id ORDER BY co.course_title ASC LIMIT 0, 12 | IP: 54.39.203.65
[2026-03-30 16:10:54] [DB_QUERY_ERROR] MSG: Unknown column 'co.use_yn' in 'where clause' | SQL:  SELECT COUNT(DISTINCT co.course_id) AS c FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id WHERE co.use_yn='Y' AND co.del_yn='N' AND co.course_type = 'paid' | IP: 142.44.228.71
[2026-03-30 16:10:54] [DB_QUERY_ERROR] MSG: Unknown column 'co.course_type' in 'field list' | SQL:  SELECT co.course_id, co.course_title, co.course_summary, co.thumb_image, co.course_type, co.price_sale, co.total_time, co.content_count, co.pass_min_progress, co.created_at, ca.category_name, COUNT(DISTINCT e.enroll_id) AS enroll_cnt FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id LEFT JOIN lms_class cl ON cl.course_id = co.course_id AND cl.del_yn='N' LEFT JOIN lms_enrollment e ON e.class_id = cl.class_id AND e.del_yn='N' WHERE co.use_yn='Y' AND co.del_yn='N' AND co.course_type = 'paid' GROUP BY co.course_id ORDER BY co.course_title ASC LIMIT 0, 12 | IP: 142.44.228.71
[2026-03-30 17:00:16] [DB_QUERY_ERROR] MSG: Unknown column 'co.use_yn' in 'where clause' | SQL:  SELECT COUNT(DISTINCT co.course_id) AS c FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id WHERE co.use_yn='Y' AND co.del_yn='N' AND co.course_type = 'free' | IP: 54.39.0.246
[2026-03-30 17:00:16] [DB_QUERY_ERROR] MSG: Unknown column 'co.course_type' in 'field list' | SQL:  SELECT co.course_id, co.course_title, co.course_summary, co.thumb_image, co.course_type, co.price_sale, co.total_time, co.content_count, co.pass_min_progress, co.created_at, ca.category_name, COUNT(DISTINCT e.enroll_id) AS enroll_cnt FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id LEFT JOIN lms_class cl ON cl.course_id = co.course_id AND cl.del_yn='N' LEFT JOIN lms_enrollment e ON e.class_id = cl.class_id AND e.del_yn='N' WHERE co.use_yn='Y' AND co.del_yn='N' AND co.course_type = 'free' GROUP BY co.course_id ORDER BY co.course_title ASC LIMIT 0, 12 | IP: 54.39.0.246
[2026-03-30 17:47:49] [DB_QUERY_ERROR] MSG: Unknown column 'co.use_yn' in 'where clause' | SQL:  SELECT COUNT(DISTINCT co.course_id) AS c FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id WHERE co.use_yn='Y' AND co.del_yn='N' AND co.course_type = 'corporate' | IP: 54.39.210.226
[2026-03-30 17:47:49] [DB_QUERY_ERROR] MSG: Unknown column 'co.course_type' in 'field list' | SQL:  SELECT co.course_id, co.course_title, co.course_summary, co.thumb_image, co.course_type, co.price_sale, co.total_time, co.content_count, co.pass_min_progress, co.created_at, ca.category_name, COUNT(DISTINCT e.enroll_id) AS enroll_cnt FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id LEFT JOIN lms_class cl ON cl.course_id = co.course_id AND cl.del_yn='N' LEFT JOIN lms_enrollment e ON e.class_id = cl.class_id AND e.del_yn='N' WHERE co.use_yn='Y' AND co.del_yn='N' AND co.course_type = 'corporate' GROUP BY co.course_id ORDER BY co.course_title ASC LIMIT 0, 12 | IP: 54.39.210.226
[2026-03-30 18:44:02] [DB_QUERY_ERROR] MSG: Unknown column 'co.use_yn' in 'where clause' | SQL:  SELECT COUNT(DISTINCT co.course_id) AS c FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id WHERE co.use_yn='Y' AND co.del_yn='N' | IP: 15.235.27.229
[2026-03-30 18:44:02] [DB_QUERY_ERROR] MSG: Unknown column 'co.course_type' in 'field list' | SQL:  SELECT co.course_id, co.course_title, co.course_summary, co.thumb_image, co.course_type, co.price_sale, co.total_time, co.content_count, co.pass_min_progress, co.created_at, ca.category_name, COUNT(DISTINCT e.enroll_id) AS enroll_cnt FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id LEFT JOIN lms_class cl ON cl.course_id = co.course_id AND cl.del_yn='N' LEFT JOIN lms_enrollment e ON e.class_id = cl.class_id AND e.del_yn='N' WHERE co.use_yn='Y' AND co.del_yn='N' GROUP BY co.course_id ORDER BY co.course_title ASC LIMIT 0, 12 | IP: 15.235.27.229
[2026-03-30 19:40:43] [DB_QUERY_ERROR] MSG: Unknown column 'co.use_yn' in 'where clause' | SQL:  SELECT COUNT(DISTINCT co.course_id) AS c FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 3 AND co.course_type = 'free' | IP: 167.114.139.36
[2026-03-30 19:40:43] [DB_QUERY_ERROR] MSG: Unknown column 'co.course_type' in 'field list' | SQL:  SELECT co.course_id, co.course_title, co.course_summary, co.thumb_image, co.course_type, co.price_sale, co.total_time, co.content_count, co.pass_min_progress, co.created_at, ca.category_name, COUNT(DISTINCT e.enroll_id) AS enroll_cnt FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id LEFT JOIN lms_class cl ON cl.course_id = co.course_id AND cl.del_yn='N' LEFT JOIN lms_enrollment e ON e.class_id = cl.class_id AND e.del_yn='N' WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 3 AND co.course_type = 'free' GROUP BY co.course_id ORDER BY co.created_at DESC LIMIT 0, 12 | IP: 167.114.139.36
[2026-03-30 22:22:00] [DB_QUERY_ERROR] MSG: Unknown column 'co.use_yn' in 'where clause' | SQL:  SELECT COUNT(DISTINCT co.course_id) AS c FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 3 AND co.course_type = 'corporate' | IP: 142.44.228.82
[2026-03-30 22:22:00] [DB_QUERY_ERROR] MSG: Unknown column 'co.course_type' in 'field list' | SQL:  SELECT co.course_id, co.course_title, co.course_summary, co.thumb_image, co.course_type, co.price_sale, co.total_time, co.content_count, co.pass_min_progress, co.created_at, ca.category_name, COUNT(DISTINCT e.enroll_id) AS enroll_cnt FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id LEFT JOIN lms_class cl ON cl.course_id = co.course_id AND cl.del_yn='N' LEFT JOIN lms_enrollment e ON e.class_id = cl.class_id AND e.del_yn='N' WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 3 AND co.course_type = 'corporate' GROUP BY co.course_id ORDER BY co.created_at DESC LIMIT 0, 12 | IP: 142.44.228.82
[2026-03-30 23:21:35] [DB_QUERY_ERROR] MSG: Unknown column 'co.use_yn' in 'where clause' | SQL:  SELECT COUNT(DISTINCT co.course_id) AS c FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 9 AND co.course_type = 'paid' | IP: 54.39.203.2
[2026-03-30 23:21:35] [DB_QUERY_ERROR] MSG: Unknown column 'co.course_type' in 'field list' | SQL:  SELECT co.course_id, co.course_title, co.course_summary, co.thumb_image, co.course_type, co.price_sale, co.total_time, co.content_count, co.pass_min_progress, co.created_at, ca.category_name, COUNT(DISTINCT e.enroll_id) AS enroll_cnt FROM lms_course co LEFT JOIN lms_category ca ON co.category_id = ca.category_id LEFT JOIN lms_class cl ON cl.course_id = co.course_id AND cl.del_yn='N' LEFT JOIN lms_enrollment e ON e.class_id = cl.class_id AND e.del_yn='N' WHERE co.use_yn='Y' AND co.del_yn='N' AND co.category_id = 9 AND co.course_type = 'paid' GROUP BY co.course_id ORDER BY co.created_at DESC LIMIT 0, 12 | IP: 54.39.203.2