No. It is not possible to change the ID of a page that currently exists. You can however delete the page and recreate the page under a new ID or overwrite the page with a database upload.
To delete a page:
Note: Deleting an item will remove the item from any page on which the item appeared. For example, if the item appeared as a special on your Home page, deleting the item will remove the item from the Home page as well as from the section in which the page is found.