Contradiction with 2 Kings 16:2
It states that Ahaz, son of Jotham, began to reign when he was twenty years old, which could imply a discrepancy if considering the timelines of their rules and if they cover overlapping periods, but does not directly contradict Jotham's age or reign.
2 Kings 16:2: Twenty years old [was] Ahaz when he began to reign, and reigned sixteen years in Jerusalem, and did not [that which was] right in the sight of the LORD his God, like David his father.