Well, I did it now.
Was helping daughter install her package colony into new hive. I was confused by the set up of the queen cage. Instead of removing a cork I pulled back a corner of the screen to expose bee candy. She checked a bit later and queen was already free. Now I've realized my mistake and we are concerned that bees may attack and kill queen.
I guess there is nothing to do but wait and see. Our plan is to wait a few days and then check for eggs.Any comments?