Good Morning everyone,

After i finished the White Mage quest lvl 50 i got the coffer with the lvl 50 gear, for some reason everytime i click the coffer it says "Unable to use the Cleric's Attire Coffer. You cannot carry more than one item of the unique type".
Is it the Chest Piece lvl 50? Do i need to discard it in order to get the coffer to open and get all items from coffer?

Thanks in advance