Purple SKT T1 Zac

I dont know how this happened, but I loaded a game with Zac's SKT T1 skin but it was purple like special weapon Zac. I swapped from special weapon zac to SKT T1 zac last second before the game started. The game said I had SKT T1 zac equipped. Whenever you select a champion, it auto-equips the most recently used skin, and it auto equipped special weapon zac for me instead of SKT T1. Now my SKT T1 zac skin is purple, even if I dont repeat the above steps.