Kingdom Hearts Birth By Sleep

[[Unknown]]

That means, iirc, that you loaded a savestate from before you saved.

Savestates are like time machines, you have to use them carefully or you'll rip apart space-time. Since the game sees a save from the future (since you time-traveled to the past), it freaks out.

It might work to backup your savedata (from Memstick/PSP/SAVEDATA) and then delete it. Or the game might still freak out since the savedata will have magically evaporated which it also doesn't expect to happen.

My suggestion: when you save in game, immediately savestate. That way you won't accidentally load the old state ever.

-[Unknown]