Contradiction with Malachi 3:6
Malachi 3:6 emphasizes that God does not change, which does not directly contradict Psalms 89:34, as both affirm His constancy.
Malachi 3:6: For I [am] the LORD, I change not; therefore ye sons of Jacob are not consumed.
Contradiction with James 1:17
This verse states that there is no change or shadow of turning with God, consistent with the notion in Psalms 89:34 that God doesn't break promises.
James 1:17: Every good gift and every perfect gift is from above, and cometh down from the Father of lights, with whom is no variableness, neither shadow of turning.
Contradiction with Hebrews 13:8
Similarly to the previous verses, this verse claims constancy in Jesus Christ, aligning rather than contradicting with the permanence of God's covenant in Psalms 89:34.
Hebrews 13:8: Jesus Christ the same yesterday, and to day, and for ever.