mailcow-dockerized-docs/docs/troubleshooting/debug-mysql_upgrade.en.md

Run a manual mysql_upgrade

This step is usually not necessary.

docker compose stop mysql-mailcow watchdog-mailcow
docker compose run --rm --entrypoint '/bin/sh -c "gosu mysql mysqld --skip-grant-tables & sleep 10 && bash && exit 0"' mysql-mailcow

As soon as the SQL shell spawned, run mysql_upgrade and exit the container:

mysql_upgrade
exit