When i try to trade the game kicks me out to menu with a message Connection Lost Internal Exception java.util.ConcurrentModificationException: Async entity load

I would like to say that when I re-enabled the new trades in .minecraft/.config/VillagerConfig/villagerconfig.json5 this issue appeared, the kick is only because of the "Legacy4J" mod.

update: i disabled "c2me-fabric-mc1.20.4-0.2.0+alpha.11.67.jar", and everything seems to work again

It's probably a incompatibility with some "optimization" mod, I can't do much.