Hello. I have just completed the required steps for the quest: Vanguard Vestments, and am ready to turn it in to Zavala. However, I can't turn in the quest because I already have the weapon: Null Composure in my collections. It seems that I already did this quest with one of my other characters, but it still makes no sense to me. I need to accept the weapon from Zavala to turn in the quest. Why can't I have two copies of both of this weapon? Can anybody please help me with this?