Trying to swap account holders for each house. Before I do this and create a mess for myself... I have account A holds house "a", account B holds house "b". I want to swap house b to account A and house a to account B. Can I straight up trade 2 houses with each other or do I need a 3rd account that doesn't hold a house currently? I am asking because one of the accounts is upgraded and the other is not. Probably doesn't matter but each house is on a different shard.