Pyro Pete Glitched

I recently started playing borderlands again to complete UVHM. I went into the campaign of carnage and it gave me the option to skip the DLC as I had already completed it. This may not have been the best idea as when I went to kill Pyro Pete the battle board to fight him isn’t there (but his character model is).

Any help would be appreciated. Thanks

P.S. When I contacted support they told me to reset my cache which like always didn’t work.