BUR #51707 has been approved by @evazion.
rename idol_wars_z -> idol_wars
It seems like the overall franchise name is just "Idol Wars." The Z might be for the game, or maybe specifically for the H version. I'm not really sure.
Renaming to allow an implication of idol_wars_z to idol_wars in case a separate tag turns out to be necessary later. Also because of autocomplete.