Brewology

Ok, I have no idea how, but my friend somehow managed to put my IDstorage keys on another persons PSP when he borroed my pandora ms. I have tried using the utilities in UPMS to fix it, but it doesn't work. The UMD drive doesn't read, he has my MAC adress, the upgrader doesn't work, and a whole lot of other problems. My PSP has a TA-079, the other is a TA-082. The key fixing utilities recognizes it as a TA-079, UPMS sees it as a TA-082. Advice is appreciated, as I have no clue what to do.