Removing unwanted Tidal artists/albums

I recently moved my Roon library to a Nucleus plus, and I now have several unwanted Tidal artists/albums appearing in my library. I used the Tidal app to remove them there, but they still appear in the Roon library. How can I delete them?

To answer my own question, I had to remove not only the artists, but the albums and tracks in the Tidal app. All is good now.