How to add a picture to an artist in itunes?

Question

macOS

Hello, such a problem, I began to tidy up in the media library, the artist has covers for all albums, but the list of artists is empty, some are normal, some do not have covers, and how to add? If you click on the artist, then the covers are updated for all albums, but not for the artist himself, the artist does not change.

In addition, Armin Van Buuren bought all the albums from iTunes.

Answer 1

The album cover is the same for all tracks, there are no more "pictures".

Answer 2

I have the same problem on 12.5 and xs what to do with this garbage. Very annoying