Stuck on "Kill the camp leader" quest

I am currently stuck on this quest, which tells me to kill the camp leader

https://preview.redd.it/w1dunavg4v1e1.png?width=538&format=png&auto=webp&s=cf2fcb55c0a769e97f8591fb22d65e081f07431d

The point is that I didn't kill this bandit but it is already dead and the game is telling me to kill him.

https://preview.redd.it/f3h73y3r4v1e1.png?width=2559&format=png&auto=webp&s=7ff8e9fe1d4787debe9cc80f923cdaccbe8940b9

If I try to loot his body to get the spurs to bring back to the dude who gave me this quest, I can see everything he's wearing except for the spurs.

https://preview.redd.it/0gq2qkgu4v1e1.png?width=1083&format=png&auto=webp&s=15524c51f8eb3659984fdbe96711f98270f418f4

https://preview.redd.it/8xsboqfv4v1e1.png?width=1066&format=png&auto=webp&s=edfe60828accf0977bdbe8ae3e80bceda56d2a21

I've read online that it's a bug and if I come back later I can kill him and get the spurs, but as I went away and waited a few days some bandits had respawned but the leader was still on the ground dead with no spurs.