I built a house for the Hearthfire DLC. I placed armor on my mannequins in my home. On one of them I placed an apprentice robe and hood. I accidentally made them duplicate. Now they won't stop. I can't improve them at a smith to tell the original from the duplicate and when they are both in my inventory, they are grouped (ie Apprentice Robes of Restoration (2)). How can I fix this?