Fast Regret strategy occurs vehicle lock problem

[PhenixY]

When I use fast regret strategy, an error occurs. "All vehicles were locked 700" . (700 is a kind of vehicle id).
Everything remain the same, only change the the parameter of fast regret to false, i.e. I use the regret insertion strategy instead of fast regret insertion strategy, it will be OK.
Into the problem, I find that count of the 700 vehicle id is 5, another type of vehicle 500 is infinite, If I set 500 to a certain number count, 700 to infinite, vehicle 500 get error too. Into the code, I find that if a certain vehicle route use a vehicle, it will lock the vehicle. If one kind of vehicle is all locked, the error occure.