Contradiction with Exodus 20:8-11
These verses detail the commandment to keep the Sabbath day holy and do no work, which can be seen as contradictory to the regular duties and service in the house of the Lord mentioned in 2 Chronicles 29:4.
Exodus 20:8-11: Remember the sabbath day, to keep it holy.
Contradiction with Hebrews 8:13
This verse speaks about the first covenant becoming obsolete, contrasting with the renewal of worship practices described in 2 Chronicles 29:4.
Hebrews 8:13: In that he saith, A new [covenant], he hath made the first old. Now that which decayeth and waxeth old [is] ready to vanish away.