I upgraded to the japanese version 2.00 long time ago, and yesterday I downgraded. After that I did not know were I could find gba roms so I upgraded back to 2.0, it worked perfect, but then I got bored so I downgraded it again, I didnt hesitate and when it was complete I had a version 1.50 psp, meaning mine didnt brick. I am thimking its alright to upgrade then downgrade and over again, but I am not sure, it worked for me, I probably wont do it anymore, just maybe though.
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