Error 500 when creating new Entity

[agri]

[EspoCRM Version 8.2.4, Ubuntu 22.04.2 LTS, PHP 8.2.5 ]

When I try to create a new entity - let's say 'occasion' -, at first I get error 500. If I send the same form a second time without changing anything, I get 'Error 409 - Name 'COccasion' is already used.'.
I then leave the form, change to administration and click rebuild. In fact, the entities list then will have an entry 'COccasion' (Name=COccasion, Label=COccasion, Type=Base, Module=Custom).
Unfortunately, I cannot find any useful information in the logs ...

[victor]

Please try to make a Hard Rebuild: https://docs.espocrm.com/administrat.../#hard-rebuild or delete this entity manually via phpMyAdmin and then make standart Rebuild via CLI.

[agri]

Hi Victor,
thanks for your tip. But it wasn't that. Rebuild - either hard or "soft" - made the system stop working. Solution: I found, owner of custom/Espo/Custom/Resources/metadata/recordDefs was set to root:root - no idea, why ...
I changed this to www-data:www-data. Works again.
Thanks again,
regards