A new South Park: The Fractured But Whole update is live on PlayStation 4. Patch 1.04 fixes several issues, including the buy back glitch. It also makes it so enemy characters “can no longer attack himself under certain conditions.” You can view all the changes by viewing the Fractured But Whole update 1.04 patch notes.
View the South Park: The Fractured But Whole update 1.04 patch notes below:

Fixed an instance where the wrong button icon is displayed
Updated incorrect selling price when selling items to vendor
Removed an invisible prop that still had collision
A rare stuck issue where players were overlapping was fixed
Players no longer able to avoid a required costume change
Mind controlled members no longer cause a rare freeze bug An enemy character can no longer attack himself under certain conditions
Other various minor bugs fixed

For more on the role-playing game, check out our South Park: The Fractured But Whole review. Here’s a snippet of what Chandler Wood had to say about the game:
Despite these couple of technical misgivings, South Park: The Fractured But Whole is another interactive journey into the minds of Matt Stone and Trey Parker. I quite literally felt like I was playing the show for the 15 hours that I spent in South Park?not surprising, given that the first game met that uncanny caliber of delivering a near perfect recreation. If easily offended, chances are you?ve already written off South Park, and chances are even higher th...