I have the feeling that the most likely cause of the crash was because your bow became unequiped (dont know why that happened though), If some of your files show that you are equiped with a bow, but some shows that you are not equiped with it anymore, it will cause some "confusion" in the game, where lets say your damage is still set to have the bow equiped, but (for argument sake) the degrading of the bow, now cant happen anymore, because that points to a file that says you dont have a bow anymore. This will then more than likely kick you out of the game due to the general error it just caused, by calling a variant (the degrading of the bow) that doesnt exist anymore.
