Ditto^^^I would try and move her first. Make sure she stays broody and then give her new eggs. I will only let my broodys hatch chicks if they let me move them to a safe location. I do not want other hens laying eggs in there with her. Sometimes they will even lay on top of the broody if she wont move out of the way. I have had too many eggs break. If she wont let me move her she has to go to the big bad broody busting coop where she stays for 3 days or so.
If you do try and move her do it at night, take some or all of her nesting material with her and then put some kind of towel or burlap over the area for a couple days to make it kind of dark. It all depends on the hen if she will stay on the eggs or not. I have some portable nest boxes that I can just move, broody and all and that seems to work the best. Lets see if I have a picture of one.....
I made these from instructions from Anna Whites website.
They either go in this, to hatch:
Or this, to break: