hiii i accidentally created this artist when there was already a tag created for them.

good news: you already effectively deleted that tag just by removing it from inappropriate posts!

however it seems the artist tag in question, nowaxnx, seems to be a valid alternative name to nowax if i'm assuming correctly that's what you're talking about
https://linktr.ee/nowax

in this case it would be more appropriate to call for an alias request. which i already did in this topic:
topic #45984