Bug whit the anvio

I can't use the anvil to pass an enchantment from one pickaxe (diamond) to another, before I had already done it with an iron pickaxe, which now I can't pass the enchantments are:

unbreakable lll and efficiency lll to unbreakable lll to and efficiency lll

I get the beak with unbreakable lll and lV efficiency but it won't let me finish doing the process no matter how much I touch, press or drag the beak. I already tried copying the world and even in creative and I can't

I would appreciate if you could fix the error as soon as possible so that I can continue with the progress of my world