I've had the same problem as Chakar, the only way I know is to have a GM ingame to replace the sword and enchantments *shrugs*
I think it has something to do with applying a Visual for a weapon.
This bug also seems to forbid you to change the appearance of the weapon in crafting menu.
You wield the weapon, are near to the stations, click on the menu and you get: "Craft Weapon: No Weapon Equipped"