I have a hive with two regular sizes hive bodies, and two queens living in them peacefully side by side without a queen excluder. It has been going on for over a month now. First I though that it is the same one but now I know for sure they are different ones. One is a little bigger in size, and I am not sure if she is the older one, also she lives downstairs. Both of queens are laying perfectly good. Now, I would like to ask what is the best way to split them up.

Thank you,