Reason: A fatal mistake on my part and mismatched Freya with her brother Freyj, therefore misleading people to look for the wrong boar (each Freya and Freyj ride a boar of their own.) I was looking for Gullinbursti, which belonged to Freyj, and thus contradicted the riddle.
Instead, I'll post 2 riddles today to try to make up for it.