i just made a mistake in tag, how to fix it

Posted under Tags

i created a new artist tag artist:vveltall2 , but this guy has alias as 'emoji' in pixiv
so i just tried to create 'artist:emoji', and i found that all others normal tag 'emoji' became to 'artist:emoji'

And now i don't know how to fix it.

PS: Can we create alias emoji_(artist) -> vveltall2 ? Although there isn't any post by emoji_(artist) [in pixiv] has been uploaded