Contradiction with Judges 1:9
This verse describes the Israelites attacking different hill country and does not mention the Jordan River system as a boundary.
Judges 1:9: And afterward the children of Judah went down to fight against the Canaanites, that dwelt in the mountain, and in the south, and in the valley. [valley: or, low country]
Contradiction with Judges 18:1
This verse mentions the Tribe of Dan seeking inheritance because they did not have territory secured.
Judges 18:1: In those days [there was] no king in Israel: and in those days the tribe of the Danites sought them an inheritance to dwell in; for unto that day [all their] inheritance had not fallen unto them among the tribes of Israel.
Contradiction with Deuteronomy 2:37
It states that Israelites did not attack lands by the river Jabbok, which differs on the conquest and boundary territories in Joshua.
Deuteronomy 2:37: Only unto the land of the children of Ammon thou camest not, [nor] unto any place of the river Jabbok, nor unto the cities in the mountains, nor unto whatsoever the LORD our God forbad us.
Contradiction with Numbers 34:12
Describes different boundaries of the Promised Land, suggesting different territorial outlines.
Numbers 34:12: And the border shall go down to Jordan, and the goings out of it shall be at the salt sea: this shall be your land with the coasts thereof round about.