Bloodborne Cusa00900 _verified_ ✔

One amateur dataminer (who asked to be called “Gehrman’s Ghost”) dug into the PS4’s error logs and found something unsettling: CUSA00900 wasn’t just a save failure. On firmware 9.00, the console sometimes flagged successful saves with the error, then overwrote them with older versions.

Soon, a small community of hunters began cataloging “CUSA00900 incidents.” The rules were bizarre:

Sony eventually patched the 9.00 firmware’s save issues. Most players report that CUSA00900 has become rare—almost extinct.

“It’s like the system is gaslighting you,” Ghost wrote. “You beat Ludwig, you see the message ‘Saving complete,’ then two hours later CUSA00900 and you’re back at the Nightmare Church.”