WHO INHERITED AIJALON AND GATHRIMMON?

Joshua 21:23-24. And out of the tribe of Dan, Eltekeh with her suburbs, Gibbethon with her suburbs, Aijalon with her suburbs, Gathrimmon with her suburbs; four cities. 1 Chronicles 6:66-69 And the residue of the families of the sons of Kohath had cities of their coasts out of the tribe of Ephraim. And they gave unto them, of the cities of refuge, Shechem in mount Ephraim with her suburbs; they gave also Gezer with her suburbs, And Jokmeam with her suburbs, and Bethhoron with her suburbs, And Aijalon with her suburbs, and Gathrimmon with her suburbs:

Ephraim and Dan's properties bordered each other.  When Dan's tribe turned to heathen-like ways, some of Dan's property was reassigned to Ephraim.  Not a contradiction.