artist images / library settings ignored

[sak]

as a follow up.still struggling to get rid of artist images.

* removed all existing music libraries
* removed all metadata files in /var/jellyfin/metadata and /var/cache/jellyfin
* restarted server
* browser cache deleted

* created a new library with _all_ metadata downloaders and metadata fetchers disabled, even with image extractors disabled

I end up with blue default icons for album covers and all album artists.

BUT two images for album artists and MANY for artists are shown, can be manualy deleted, one by one

So I guess that the information remains in the database even if all libraries are removed. Do you have any suggestions how to proceed?

Do I need to do a full re-install?
thank you