I have a personal MM instance that was upgraded from a MySQL database last year. It was on version 10.5.14 (ESR). System is AlmaLinux-10, postgresql-server-16.13-1.
Today I upgraded it to 10.11.18 (ESR) without any apparent issues. I then attempted to upgrade that to 11.7.1 (ESR) and mattermost would no longer start. The log has repeated instances of:
{"timestamp":"2026-05-25 14:15:22.787 -04:00","level":"error","msg":"failed to initialize platform: cannot create store: failed to apply database migrations: driver: postgres, m
essage: failed to execute migration, command: executing_query, originalError: pq: duplicate key value violates unique constraint \"db_migrations_pkey\" (23505), query: \n\nINSER
T INTO db_migrations (version, name) VALUES (142, 'create_content_flagging_tables')\n","caller":"commands/server.go:75"}
Do I need to go to a different release first? I didn’t see any earlier 11.x releases tagged ESR.