The Importance of Inspiration in Biblical History

The phrase and his sons were priests to the tribe of the Danites could have been almost a parenthetical added later. If it refers to 721, then I think we would have to say, yeah, this looks like at least it was edited if not written after the Northern Kingdom was destroyed. May also just be something that was added on, perhaps by Joshua under the inspiration of the spirit. But that doesn't give that's not a problem for understanding of the doctrine of inspiration or an erancy.