Contradiction with Proverbs 10:27
2 Kings 21:19 states that Amon was 22 when he began to reign, yet Proverbs 10:27 suggests a righteous life prolongs days, contradicting Amon's short reign ending at age 24.
Proverbs 10:27: The fear of the LORD prolongeth days: but the years of the wicked shall be shortened. [prolongeth: Heb. addeth]
Contradiction with Exodus 20:12
2 Kings 21:19 details Amon's short reign, which contradicts the promise of a long life in Exodus 20:12 for honoring one's parents, implying Amon's disregard.
Exodus 20:12: Honour thy father and thy mother: that thy days may be long upon the land which the LORD thy God giveth thee.