Contradiction with Exodus 34:12
This verse warns the Israelites not to make covenants with the inhabitants of the land, contradicting the treaty made in Joshua 9:11.
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:
Contradiction with Deuteronomy 7:2
This verse commands the Israelites to utterly destroy the nations and make no covenant with them, which opposes Joshua 9:11 where a treaty is made.
Deuteronomy 7:2: And when the LORD thy God shall deliver them before thee; thou shalt smite them, [and] utterly destroy them; thou shalt make no covenant with them, nor shew mercy unto them:
Contradiction with Deuteronomy 20:16-18
These verses instruct the Israelites to completely destroy certain nations and not let them live, contradicting the peace treaty in Joshua 9:11.
Deuteronomy 20:16-18: But of the cities of these people, which the LORD thy God doth give thee [for] an inheritance, thou shalt save alive nothing that breatheth:
Contradiction with Exodus 23:32-33
These verses prohibit making covenants with the inhabitants of the land, contrasting with the treaty made in Joshua 9:11.
Exodus 23:32-33: Thou shalt make no covenant with them, nor with their gods.
Contradiction with Numbers 33:55
This verse warns that not driving out inhabitants will cause trouble, which contrasts with the treaty agreement in Joshua 9:11.
Numbers 33:55: But if ye will not drive out the inhabitants of the land from before you; then it shall come to pass, that those which ye let remain of them [shall be] pricks in your eyes, and thorns in your sides, and shall vex you in the land wherein ye dwell.