Thread Prefix Not Removing


This may just be a problem unique to me, because I cannot seem to find anyone else with the same problem. I am creating thread prefixes to be used on my forums, and for some reason, I cannot delete one of the prefixes I created.

To see what I have tried, view the attachments.

Is there some way I can remove this thread prefix? I can successfully create/remove other thread prefixes, so I am curious as to why this one is stuck.

Any help is much appreciated, thanks.