like:

You are not alone. You’ve spent hours ripping Helios’ head off, climbing the Chain of Balance, and finally defeating the mighty Cronos. Then, disaster strikes. Your PlayStation 3 freezes. Your hard drive corrupts. Or worse, you accidentally saved over your 95% completion file.

God of War III hangs while saving or reloading checkpoint : r/rpcs3

If the save is "fixed" but still shows as belonging to another user, you may need to use a tool like Apollo Save Tool (on Hen/CFW) or PS3 Save Resigner on PC to link the save to your profile.