one is the correct one:
but, after my files tags containing George Lewis, roon credites also
who has nothing to do with this albums.
It’s the usual, well known problem: when there exist 2 (or more) artists with the same name, roon does not match the file tags (of an album) with its own metadata for that album, but adds a second (wrong) artist in the credits.
i add that in general roon metadata are incomplete (they are 80% only at album level, and not at track level). that’s why … file tagging is really unavoidable…