[Gacha items being flagged on MP]

I dont even understand why my item was flagged either, I buy gachas and resell them so  what is the problem? i logged into my store and i get this message stating my item has been flagged when i sold 1 other from the same machine none of those were flagged and i get no explanation except due to a  mis listing as the others are listed the same way   

[Gacha keys]

ok does anyone know how to get a gacha key if your gacha key is no copy as well????