If the page came from the checkout wizard you will need to run the checkout wizard again to recreate the page. Before you do this you should save a backup of your current confirm page and remove it from the site.
You will need to specify the settings that same as before. When you get to the last stage of the wizard you will have a chance to set the names of the page, make sure that you update the names here so they don't overwrite any existing pages.
I would suggest that you make a backup of the pages in your site once you get it worked out so that you can go back to a page if you need to.