It appeared some time ago on Reddit I think. It’s ai generated. The title of the reddit post was like “my grandma did that”

The creator of MySQL, MaxDB and MariaDB named them after his children My, Max and Maria, so why not

I’ve seen another comment about this but I think you should try to check and repair the disk with fsck

Dope!

2 questions: How? And why?

I haven’t got this kind of issue with nextcloud, I’m pretty sure you can reset your password using occ via cli