Yeah I did the dupe glitch. Anyways I fixed it by going through apartment.There was a case where people who filled their garages up with dupes (using the hooker method), the garage would hang. They discovered that if you use the Mechanic, call out a vehicle from the garage affected and sell it, it helped. Repeat until you can enter (although this was for dupes of cars they were going to sell anyway. An issue if you don't want to sell any of the cars).