Contradiction with 1 Chronicles 15:2
This verse states that only the Levites should carry the Ark of God, contradicting 1 Samuel 30:7 where Abiathar, though not clearly stated as a Levite, handles the ephod for divination.
1 Chronicles 15:2: Then David said, None ought to carry the ark of God but the Levites: for them hath the LORD chosen to carry the ark of God, and to minister unto him for ever. [None...: Heb. It is not to carry the ark of God, but for the Levites]