Composition Claimed by someone else

I just logged in for the first time in a long time and have realized that one of my scores https://musescore.com/user/1742661/scores/2735531 claims to be based on "Dandelion Fields by misc tunes" who is definitely not me. How can I get this taken off? I tried to change it by clicking edit but the dialog that pops up doesn't work and doesn't let me enter anything.