with our last patch it seems that there is a little bug that made his way into the game:
It's possible that even though it seems like you have no item equipped, the game gives you the message "You have this item", when you try to equip another item of that type.
Thanks for your tickets regarding this problem. It's a visual bug where you can not see certain items that are already equipped. It's the same case for items that might have been in your inventory beforehand but now they disappeared. We already found the root of that problem and will most likely release a hotfix tomorrow. To solve the bug, there is no patch or maintenance needed. You can continue playing while we are solving the issue.
For updates join our Giiku Community Discord at https://discord.com/invite/giikugames