Dissidia 012 SaveData Corrupt

Hello everyone,i have a big trouble,at the end of a battle,i wanted to take a screenhost,but...I took it while the game was Saving,so...The PSP Froze,and switched off..Once i restarted it and get into game again,the Memory stick says there are : NO DATA :(

I checked into Memory stick,and my ULES01505GameData00 turn into _OWRITE_00000000000169881994

Man,what can i do ? i don't want to lost it.Thanks for your answer.I hope there is a fix for this.