Hello!

The current update has rendered previous saves useless. Find your save folder (should be Documents/Larian by default) and nuke everything in it. If you do it in game, there's a chance it would crash. You also can only delete them one by one. If you delete from the save folder, you can select everything at once and hit the delete key.

..........

?

I deleted mine in the game menu, it worked fine.

My game CTD three times. I don't think I would have been able to clean up my saves without going straight to the folder.