In the past year I learned that it was not a good idea to attempt to winter a hive that lost its queen just before fall after two attempts to requeen.
I should have taken my losses early and combined that hive with one that had a working queen. I was stubborn and tried to get them to take a new queen twice. I went into winter with old bees in that hive and their numbers were not high enough to move the cluster even with short period of 50 degree weather. If I had combined that hive I may have been able to split them in the spring.