invalid thread showing at all forums
 

Hi All,


We have a problem that an old thread is showing up on all boards, categories etc.
It has the same link in all of them and they all show up like this:

http://www.XXXXX.com/forums/showthread.php?t=0

We can't edit it, we can't delete it.
When I try to delete it, it pops the message:

"You did not select any valid threads"

Any pointers on how to get rid of this?

Thanks,

-Sup.