So I think I found a bug in the Elven forest section of the Incubus war aftermath. I go to the potion hermit on the overworld map, and I've visited her before because I have the amulet of alchemy. However, she tells me that she doesn't recognize me and to go away, which I think is because I have the amulet of alchemy II, since I upgraded it in Kaant. So because I don't technically have the original amulet anymore, it doesn't let me get the benefit from her.
Is this actually a bug, or just intended behavior. And if it is a bug, is there a way to edit my save and either revert the amulet to the original state or spawn in a second one to fix the problem?