delete from vehicle where (VLPN,VLPNColor) in (
    select t.VLPN,t.VLPNColor from (
        select VLPN,VLPNColor,count(*) from vehicle group by VLPN,VLPNColor having count(*)>1
    ) t
) and VehicleID not in (
    select t.VehicleID from (
        select max(VehicleID) as VehicleID from vehicle group by VLPN,VLPNColor having count(*)>1
    ) t
)