Unable able to locate a shortcut... blocking workflow

I have been developing my workspace on BTT for a while now and I have a shortcut for playpause next and previous however it is nowhere to be found when I go to try and change it. I am unable to find a workaround either. Any help or similar situation?

I'm thinking it could either be some sort of hidden shortcut. I just don't know because I can't search thru the shortcuts... it blocks my workflow because I have assigned a different action to the same shortcut and so every time it fires I would have to open the dialogue box...