I can't unfollow a thread

It says its in purgatory and 404 not found. It was made by Charizard. I don't know what happened to the thread. Can someone solve this please? Its a bug.

http://www.gamespot.com/forums/purgatory-909188622/the-official-nx-thread-dragon-quest-x-and-xi-annou-32182246/#173

http://www.gamespot.com/forums/purgatory-909188622/

@GameboyTroy: Are you receiving emails from that thread? Or just trying to get it out of your list of Follows?

@wemmick: I'm just trying to get it out of my list of follows.

@GameboyTroy: Gotcha. We'll take a look.

@GameboyTroy: It should be gone now - could you verify?

Its gone now. Thanks. I'm not sure how it happened.