When creating a new page or changing the name of a page, you may come across the Name has already been taken error message. This is an error message that is passed to us when you try to save or create a page with the same name as a page that already exists on your store.
To resolve this issue, choose a unique name for your page. Page names can be changed within the page settings under the page title option. The How do I change my page title article provides more information.
Note: This will also apply if you have a different page type with the same name. For example, pages/example and product/example will present this error