Control: tags -1 moreinfo Hello!
This is not a bug in the Debian packaging and not really an upstream bug either. The error message seems pretty clear: > [ERROR] InnoDB: Upgrade after a crash is not supported. The redo log was > created with MariaDB 10.3.27. Before you upgrade, you need to ensure your database shuts down correctly and cleanly. If it did not shut down cleanly on 10.3.27, you need to start it again with 10.3.27, let the startup do the error recovery, and then shut it down cleanly. Only after that can you attempt to upgrade to 10.5 again. Please do that and then tell me if you got the database started on 10.5.