Did you have both "Ghoulbane Empowered" and "Gogas Afadin" quests in your journal at the time? Those quests are essentially the same subquest, but for good and evil respectively. It looks like if you had both then things could get conflicted on the bones. I'll look into sorting that out.
LINK
(Jindrack) Re:Ghoulbane Empowered: Kassar
