Contradiction with Leviticus 24:9
This verse allows for the consumption of offerings by Aaron and his sons, which contradicts Leviticus 6:21's regulation that requires the offering to be wholly burnt.
Leviticus 24:9: And it shall be Aaron's and his sons'; and they shall eat it in the holy place: for it [is] most holy unto him of the offerings of the LORD made by fire by a perpetual statute.
Contradiction with Numbers 18:9
Includes offerings as part of the priestly entitlement to eat, whereas Leviticus 6:21 specifies a burnt offering.
Numbers 18:9: This shall be thine of the most holy things, [reserved] from the fire: every oblation of theirs, every meat offering of theirs, and every sin offering of theirs, and every trespass offering of theirs, which they shall render unto me, [shall be] most holy for thee and for thy sons.
Contradiction with Deuteronomy 12:27
Permits eating of some offerings after burning the fat, contradicting the total consumption by fire requirement in Leviticus 6:21.
Deuteronomy 12:27: And thou shalt offer thy burnt offerings, the flesh and the blood, upon the altar of the LORD thy God: and the blood of thy sacrifices shall be poured out upon the altar of the LORD thy God, and thou shalt eat the flesh.