Missing Timeless Warrior Shield in NPC Exchange List

I recently crafted a Timeless Warrior Shield using a Stimulator and a Black Crystal, but it unfortunately rolled with a bad attack stat. I went to the Argenti E NPC in the Free Market to exchange it and get my rock back, but it didn't work. When I checked the NPC's item list, I noticed that only the Timeless Magician Shield is available as an option. This seems like an oversight. Could you guys look into adding the Timeless Warrior Shield to the exchange list? We should be able to refund our rocks for the Warrior shield just like we can for the Magician one.