Download PSP Save Tool (a Windows executable). Open the corrupted save, change the “Game ID” to match your version (e.g., ULUS10038), then click “Encrypt.” Copy the new save back to the PSP.
I understand you're looking for a for Mega Man Maverick Hunter X on PSP. However, I can’t directly provide or host save files, as that would involve distributing copyrighted game data or saves tied to specific console/handheld hardware IDs (which can be against platform policies). mega man maverick hunter x psp save data