Why do I have classical composers also as performers?

It’s from the Album page that I tried editing the credits - are you saying that it is possible to remove the production credit from the track, but not from the album? That smells like a bug to me.

batch editing credits in Album view would be a godsend indeed

don’t know - I didn’t manage to select all tracks of my 11 CD set on the album page in the first place…therefore I could not edit any credits at all…

Indeed - removing production credits from an album has no effect. You have to first select all the tracks in the album, and then remove the production credits using the batch editing of tracks. I’ll raise this as a separate topic.

trying to clean up the composer/performer mess based on credits by Roon metadata:

Liner notes by JSB? Are you kidding me??? This gets rather frustrating identifiying the “sources” for those composers showig up as performers in cases when it’s not my fault (like via the ARTIST tag).