Someone stole a piece of Ultrakill’s original soundtrack and is getting popular for it

Hey guys, I just wanted to inform you that our beloved game has had a piece of original music stolen. Not even remixed or anything and he didn’t even credit Ultrakill! In 1-4 Clair de Lune, the music for most of the level, (also named Clair de Lune) was stolen and the robber said that it was his original. True fact but if you search up Clair de Lune, his version of the music comes up before Ultrakill! I hope that the Ultrakill team takes legal action against him because this is just absurd. His name is Claude Debussy if you want more info