Contradiction with Numbers 26:11
Numbers 16:27 suggests everyone associated with Korah was punished, but Numbers 26:11 notes the sons of Korah did not die.
Numbers 26:11: Notwithstanding the children of Korah died not.
Contradiction with Exodus 20:5
Numbers 16:27 involves the punishment of children for their fathers' sins, while Exodus 20:5 suggests children are punished.
Exodus 20:5: Thou shalt not bow down thyself to them, nor serve them: for I the LORD thy God [am] a jealous God, visiting the iniquity of the fathers upon the children unto the third and fourth [generation] of them that hate me;
Contradiction with Ezekiel 18:20
In Numbers 16:27, children suffer for parents' sin, but Ezekiel 18:20 states individuals only bear their own sin.
Ezekiel 18:20: The soul that sinneth, it shall die. The son shall not bear the iniquity of the father, neither shall the father bear the iniquity of the son: the righteousness of the righteous shall be upon him, and the wickedness of the wicked shall be upon him.
Contradiction with 2 Kings 14:6
Numbers 16:27 shows collective family punishment, whereas 2 Kings 14:6 says children should not be put to death for parents' sins.
2 Kings 14:6: But the children of the murderers he slew not: according unto that which is written in the book of the law of Moses, wherein the LORD commanded, saying, The fathers shall not be put to death for the children, nor the children be put to death for the fathers; but every man shall be put to death for his own sin.