Contradiction with Judges 18:29
1 Chronicles 8:40 states the sons of Ulam were mighty men of valor, this contrasts with Judges 18:29, which highlights the tribe of Dan taking over the land, not mentioning Ulam's lineage.
Judges 18:29: And they called the name of the city Dan, after the name of Dan their father, who was born unto Israel: howbeit the name of the city [was] Laish at the first.
Contradiction with 2 Samuel 1:22
1 Chronicles 8:40 depicts archers, while 2 Samuel 1:22 credits the sword of Saul and Jonathan, emphasizing different types of warriors.
2 Samuel 1:22: From the blood of the slain, from the fat of the mighty, the bow of Jonathan turned not back, and the sword of Saul returned not empty.