[HELP]Vehicles Not Destroying

Hey all i have a /bike system , when a player type /bike he gets the Bike/car , but it doesn't destroy , i want something like , when a player spawn a vehicle it must destroy in 5 minutes if no one use it , and if the player spawn another type of bike , the first bike must destroy



Example :



A player spawn BMX , and again he Spawn NRG , then BMX must destroy , And If he didn't spawn any other vehicle then BMX must destroy in 5 minutes when no one used it , Thanks