Karrueche Tran says Travis Scott is making a HUGE MISTAKE by doing the Super Bowl halftime show with Maroon 5 ... and now she's hoping and praying he back out ASAP.
"I just don't think it's a good idea," Tran told us outside Hyde on the Sunset Strip ... "I'm really hoping it's not gonna happen."
Seems Tran -- who's dating ex-NFL star Victor Cruz -- is unhappy with the way the league is treating players like Colin Kaepernick.