PCSX 2, Memory Card, and Save State Troubles.

Hiya. I sent my deck off for repair a few weeks ago and put everything on an SD card. I've reinstalled EmuDeck and everything seems to be going fine.....except my save state on PCSX2 (specifically Xenosaga 1) is now giving this error:

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"This savestate is an unsupported version and cannot be used. You can download PCSX2 Unknown from pcsx2.net and make a normal memory card save. Otherwise delete the savestate and do a fresh boot."

When loading onto PCSX2 on my PC, I get a "corrupted" error, but the virtual memory card works fine. The emulator on my steamdeck doesn't recognize it, and a save state I made from it on my PC and transferred to my steam deck gives the same error. EDIT: seardching for "PCSX2 Unknown" doesn't really bring much up.

The only thing that I can think I've done different is probably installing newer versions of the emulators from EmuDeck and keeping my files on the SD card instead of on the deck itself - I think that might be an issue, but I'm not sure. Thanks for any help y'all can offer.