Also, if the brood nest has a cap of honey over it for 4 to 6 inches, they will not move it for her to move up. She won't cross it and split her brood nest. Therefore, she thinks she is honey bound and they prepare for a swarm. When adding a swarm prevention super, you must break that honey cap. It is best done by putting 2 or 3 empty frames in the brood chamber and moving the brood frames up.