Contradiction with Joshua 9:24
This verse reveals that the Gibeonites deceived Joshua and the Israelites out of fear, which contrasts with their claim in Joshua 9:9 of coming from a far country because of the LORD.
Joshua 9:24: And they answered Joshua, and said, Because it was certainly told thy servants, how that the LORD thy God commanded his servant Moses to give you all the land, and to destroy all the inhabitants of the land from before you, therefore we were sore afraid of our lives because of you, and have done this thing.
Contradiction with Exodus 34:12
God warns the Israelites not to make a covenant with the inhabitants of the land, contradicting the Gibeonites' intent to form a covenant under false pretenses in Joshua 9:9.
Exodus 34:12: Take heed to thyself, lest thou make a covenant with the inhabitants of the land whither thou goest, lest it be for a snare in the midst of thee: