Can you downgrade the game version of an Assassin's Creed Odyssey Save file?

I have been playing AC Odyssey on game pass and did all the Atlantis missions to find out i cant explore atlantis without the DLC (Which is super expensive on ubisoft play). So i figured i would download the cracked version to play the atlantis storyline..

I got the FitGirl version and set everything up to transfer my save files and everything only to get a prompt saying I cant load the save until my game is updated.. Now I believe I have been playing the 1.5.6 version on game pass and the latest crack i could find was for 1.5.3

I have almost 110 hours of playtime on the game pass save and i really don't want to do everything again (i love my build). Is there anyway i could trick the game into loading my old save?

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TL,DR : Is there anyway to edit a save file (1.5.6) so i can play it in an older version (1.5.3) of the game?