Blueprint to C++ and Engine Freezing?

[Alexa.Ki (Alendromeda.ki)]

i did something like and it gives me duplicate locations

while (true)
					{
						RandomLocations(Available, Location, indexes);
						if (UsedLocationss.Find(indexes) == -1)
						{
							SpawnLocation = Location;
							UsedLocationss.Add(indexes);
							break;
						}
					}