I've been trying to decide whether I should reroll some of my owned skin shards into a different skin or just disenchant them into orange essence. However, I was unsure if it was possible to reroll into a skin that I already own. If I just end up getting a skin I already own, it would be more beneficial to just disenchant them and buy a skin that I don't own.
The only posts that I've been able to find related to this question are based around rerolling champions, for example this Arqade post, or skin types (i.e. legendary, epic, etc.), such as this Reddit post. However, I've been able to find none relating to skins.