Expired Desolate Asteroid Belts

I know what expired means. I know what a Desolate Asteroid Belt is.
What’s an expired desolate asteroid belt? Do desolate asteroid belts move around or something? I saw this phrase in patch notes and it confused me because noob. Off the cuff it seems like it means a spot where a desolate asteroid belt had been, after moving to a new spot.

It’s just a name for a particular site. There are many sites, so there are also many names. Some are great, some are OKish (I’m still fan of the “Hidden Hideaway”).