WP error ‘Could not insert post into the database’

Support said… Thanks for contacting us and sorry you’re having trouble here.

• Have you added any custom filters recently?
• Are you able to create regular posts?
• do you have any errors in the PHP debug log?
• have any plugins been recently installed or updated, or versions of WordPress?

I was able to confirm that this happens on Podcasting → Add New Episode

log shows…

WordPress database error: [Duplicate entry ‘0’ for key ‘PRIMARY’]
INSERT INTO 21DtDSD_actionscheduler_actions ( hook, status, scheduled_date_gmt, scheduled_date_local, schedule, group_id, priority, args ) SELECT 'action_scheduler_run_recurring_actions_schedule_hook', 'pending', '2026-07-07 15:43:11', '2026-07-07 15:43:11', 'O:32:\"ActionScheduler_IntervalSchedule\":5:{s:22:\"\0*\0scheduled_timestamp\";i:1783438991;s:18:\"\0*\0first_timestamp\";i:1783438991;s:13:\"\0*\0recurrence\";i:86400;s:49:\"\0ActionScheduler_IntervalSchedule\0start_timestamp\";i:1783438991;s:53:\"\0ActionScheduler_IntervalSchedule\0interval_in_seconds\";i:86400;}', 3, 20, '[]' FROM DUAL WHERE ( SELECT NULL FROM DUAL ) IS NULL

WordPress database error: [Duplicate entry ‘0’ for key ‘PRIMARY’]
INSERT INTO 21DtDSD_actionscheduler_actions ( hook, status, scheduled_date_gmt, scheduled_date_local, schedule, group_id, priority, args ) SELECT 'action_scheduler/migration_hook', 'pending', '2026-07-07 15:44:12', '2026-07-07 15:44:12', 'O:30:\"ActionScheduler_SimpleSchedule\":2:{s:22:\"\0*\0scheduled_timestamp\";i:1783439052;s:41:\"\0ActionScheduler_SimpleSchedule\0timestamp\";i:1783439052;}', 1, 10, '[]' FROM DUAL WHERE ( SELECT NULL FROM DUAL ) IS NULL

WordPress database error: [Duplicate entry ‘0’ for key ‘PRIMARY’]
INSERT INTO 21DtDSD_actionscheduler_actions ( hook, status, scheduled_date_gmt, scheduled_date_local, schedule, group_id, priority, args ) SELECT 'publishpressfuture_check_expired_actions', 'pending', '2026-07-07 15:43:12', '2026-07-07 15:43:12', 'O:32:\"ActionScheduler_IntervalSchedule\":5:{s:22:\"\0*\0scheduled_timestamp\";i:1783438992;s:18:\"\0*\0first_timestamp\";i:1783438992;s:13:\"\0*\0recurrence\";i:86400;s:49:\"\0ActionScheduler_IntervalSchedule\0start_timestamp\";i:1783438992;s:53:\"\0ActionScheduler_IntervalSchedule\0interval_in_seconds\";i:86400;}', 2, 10, '[]' FROM DUAL WHERE ( SELECT NULL FROM DUAL ) IS NULL

WordPress database error: [Duplicate entry ‘0’ for key ‘PRIMARY’]
INSERT INTO 21DtDSD_posts (post_author, post_date, post_date_gmt, post_content, post_content_filtered, post_title, post_excerpt, post_status, post_type, comment_status, ping_status, post_password, post_name, to_ping, pinged, post_modified, post_modified_gmt, post_parent, menu_order, post_mime_type, guid) VALUES (1, '2026-07-07 08:43:12', '0000-00-00 00:00:00', '', '', 'Auto Draft', '', 'auto-draft', 'podcast', 'open', 'closed', '', '', '', '', '2026-07-07 08:43:12', '0000-00-00 00:00:00', 0, 0, '', '')

Could not insert post into the database.

Well… now they do not update or save…

“Updating failed. The response is not a valid JSON response.”

ugh…