Initially, I downvoted it, but it actually seems fine. If a band renames, the tag should often be aliased to the new name, even if it changes its roster to have different members. Like if BLACKPINK got renamed to PINKBLACK, would you NOT alias it?? Let's use the most current group name, even if there were posts tagged as the old group name.
In a similar situation, counter-strike: global offensive renamed to counter-strike 2. CS2 has stuff the first game didn't, but that's fine. So I upvoted this.
Status quo is fine too. Or you can treat it like an Overwatch 1/Overwatch 2 situation and split it; whatever.