05/25/2026 08:50:07  -  Mysql error occurred:INSERT INTO refill_proposal (`id`, `imei`, `tray_json`, `created_at`, `last_modified_at`, `status`, `slot`, `date_of_refill`, `proposed_by`) VALUES ('274584190', NULL, 'null', '2026-05-25 08:50:06', '2026-05-25 08:50:06', 'active', NULL, NULL, NULL)  ON DUPLICATE KEY UPDATE `tray_json`='null' , `last_modified_at`='2026-05-25 08:50:06' , `status`='active'   -- Column 'imei' cannot be null