Hey @Niccolo_Terzi,
This edit was only made a couple days ago, and per Joel’s post, this can take a little bit of time to reflect in your database.
https://community.roonlabs.com/t/artist-equivalence-issues/7184/575
I’d definitely give it a week or so and then update us here if there is no change and we can take a closer look.
Thanks,
Dylan