Contradiction with 1 Kings 9:10-11
In these verses, Solomon gives Hiram twenty cities in the land of Galilee, which contradicts 1 Kings 9:14 where it seems to imply Hiram gave Solomon gold for the cities.
1 Kings 9:10-11: And it came to pass at the end of twenty years, when Solomon had built the two houses, the house of the LORD, and the king's house,
Contradiction with 2 Chronicles 8:2
This verse suggests that Solomon rebuilt and fortified the cities that were initially given to Hiram, contradicting the implication of a transfer made from Hiram to Solomon in 1 Kings 9:14.
2 Chronicles 8:2: That the cities which Huram had restored to Solomon, Solomon built them, and caused the children of Israel to dwell there.