The save data for my 'NFS Shift' game used to work fine when I was running the 3.80 M33-5 cfw.
But after upgrading my cfw to 5.50 Prome-3, the game shows a 'Load failed. Corrupted Save Data' warning during the initial load.
Any solutions or fixes to this problem? Thanks in advance for any help !

EDIT: Sorry!, but I forgot to mention that the save data doesn't show up as a corrupted icon on the psp xmb itself. Only when I launch the game, it tells me that the 'Load has failed as the save data is corrupted'.
Is there any other way to make the save load again, without having to revert to the older cfw ? (@Ryu, thanks for your quick reply)