Serial = OldItemInst.getSerial()
        if Serial != 0:
            htmltext = "You can not make this action because your item have serial."
        else:
            st.getPlayer().destroyItem("exchange",OldItemID, 1, st.getPlayer(), 0)
            NewItem = ItemTable.getInstance().createItem("exchange:"+str(Serial), NewItemID, 1, st.getPlayer())
            st.getPlayer().addItem("exchange", NewItem, st.getPlayer(), 0)
            htmltext = "Upgrade has been successfully done!"