As title and subject says. I got a Relic quality Greatsword BP in my inventory. Not sure if it was a drop or a reward from a mission/lootbox. BP say's I can't use it because it's already known. Crafter has none of the BP's in it's usable list.

Images follow, Steam Public Screenshot
https://steamcommunity.com/sharedfiles/filedetails/?id=2909608353
https://steamcommunity.com/sharedfiles/filedetails/?id=2909608365

I'm not sure what info you need/want but my character is non-seasonal. I didn't skip the campaign as this is my first or second toon.