Things You'll Need
Instructions
Turn on the PSP and connect it to the computer via USB cable.
Find the game save on the PSP in the "DATA" folder.
Move the corrupted game save into a different game folder to allow the PSP to load the save from a different folder. This should repair the corrupted save.
Disconnect the PSP. Load the game and its save. If the game save still won't load, create a new "DATA" folder on the PSP memory stick and try the above steps again.