Luckily it only cost me an HP Material, but when my inventory was 30/30, no matter how many times I would elect to sell off a Scape Doll or Monomate, it wouldn't let me take the HP mat. Thanks in advance for looking into this!
Posted about the same issue on October, 14th...no reply yet xd tried it several times to sell in hope to get that pd, but we'll i gave up lel, happened to me multiple times before I just empty my inventory before gambling now -.-https://www.pioneer2.net/community/threads/gallons-shop-roulette.16187/
Thanks @Yuffie , and yes I plan to do the same. However, if it's not fixable, there should at least be a warning in the quest or the game's description.