Contradiction with 1 Samuel 31:8
This verse describes how the Philistines found Saul and his sons' bodies on Mount Gilboa after they had died, which does not present a contradiction with 1 Chronicles 10:8 but coincides with it, as both describe the aftermath of Saul’s death.
1 Samuel 31:8: And it came to pass on the morrow, when the Philistines came to strip the slain, that they found Saul and his three sons fallen in mount Gilboa.