Sale of vehicles used in rental properties

Own two rental properties and use multiple vehicles for each.  Each year I apportion travel (standard expense deduction)  to each property using both vehicles.  Sold one and traded in the other. 

 

Do I enter the sales under each property or just under one property?  If just one, how do I dispose of the vehicles on the other property?  The sold vehicle was used on one property since 2008, the trade-in was placed in service in 2018. 

 

Thanks!