Changing 74AC74(U11) with PO74G74A has been suggested for a long time. I can confirm it is safe and easy to do, here in few simple steps:
1. Remove U11, preferably by hot air. Turn the board back and cut the 5V trace in the corner
2. Solder the new chip and put a small wire between the two decoupling caps (hot side, not GND)
You are all set!