Do not allow users to have multiples reservations of the same asset at the same time.
Do not allow users to have multiples reservations of the same asset at the same time.

OpenMOOC/moocng,GeographicaGS/moocng,GeographicaGS/moocng,GeographicaGS/moocng,GeographicaGS/moocng,OpenMOOC/moocng