For the DnD 2024 character sheet, I was trying to modify an existing magic item, specifically Elven Chain Shirt. I wanted to change it's magic AC bonus from +1 to +2. The +1 bonus is in the item (it applies to the character's AC), but there's no modifier line for it. When I add a separate +2 modifier line, the existing +1 modifier is still there. I cannot find where to delete or modify the initial +1.