I've had this problem several times here lately while playing around with banking queens. After I pull a queen out of a nuc and put an unmated one back in when I try to release her the bees try to kill her. I have tried several different types of releases and keep getting the same results. The most recent was to pull the laying queen and just a few mins. later put the other queen in the nuc inside the cage and 3or 4 days later release her to the frame. Anybody got the solution?