Gaining a skin I already own

I just logged into league and was told that as a sign of appreciation I gained the urfwick skin. The issue is, I've had that skin for years. Being gifted a skin that you already own as "a sign of appreciation" is a good way to leave a bad taste in the mouths of your old players. I really hope Riot does something about this bug soon. Preferably with a gift of a skin I don't already own.