Contradiction with 2 Samuel 7:10
This verse states that God appointed a place for Israel to dwell and move no more, while Joshua 19:15 describes allotments and movements of territories.
2 Samuel 7:10: Moreover I will appoint a place for my people Israel, and will plant them, that they may dwell in a place of their own, and move no more; neither shall the children of wickedness afflict them any more, as beforetime,
Contradiction with Numbers 34:2
This verse establishes specific borders for the land of Canaan, whereas Joshua 19:15 lists a city within different borders.
Numbers 34:2: Command the children of Israel, and say unto them, When ye come into the land of Canaan; (this [is] the land that shall fall unto you for an inheritance, [even] the land of Canaan with the coasts thereof:)