Hammer of Kamasa bug act6

good evening, i have a bug to report, im playing on a level 90 character, while i was helping a random player from global chat to kill the golden vault boss i picked up the hammer from the osvald's mission, now i can't get rid of it, i can't drop it, can't deliver it to osvald in act 6 since the ziggurat (present) cannot be accessed.
is there a way for you to remove it manually from my inventory? six slots of the inventory are occupied by the hammer and it might be annoying in the future.
i alredy tried shutting the game off and on, but nothing changed, please heeeelp