Contradiction with Deuteronomy 2:29
This verse suggests that some nations did allow passage and provision without payment, contradicting Numbers 20:19's negotiation for payment for passage.
Deuteronomy 2:29: (As the children of Esau which dwell in Seir, and the Moabites which dwell in Ar, did unto me;) until I shall pass over Jordan into the land which the LORD our God giveth us.
Contradiction with Deuteronomy 2:4-5
God instructs the Israelites not to contend with the Edomites but to pass through peacefully, which contrasts with the negotiation attempt in Numbers 20:19.
Deuteronomy 2:4-5: And command thou the people, saying, Ye [are] to pass through the coast of your brethren the children of Esau, which dwell in Seir; and they shall be afraid of you: take ye good heed unto yourselves therefore:
Contradiction with Exodus 23:31
This verse states that the Israelites would have defined territorial boundaries provided by God, suggesting no need for negotiation.
Exodus 23:31: And I will set thy bounds from the Red sea even unto the sea of the Philistines, and from the desert unto the river: for I will deliver the inhabitants of the land into your hand; and thou shalt drive them out before thee.