The best way to duplicate a page without creating issues is by using the InfiniBuilder.
Login to your website, navigate to the page you’d like to duplicate and open the Tools menu using the top toolbar. You can then use “Duplicate Layout” and it will start the process creating a new page, to which you can add a title, then proceed using the InfiniBuilder to finalize your content and layout from the page you used as a starting point.
You may find that there are 3rd party plugins that will duplicate pages as well. We advise against using these as they can sometimes cause issues with the layout or styles of the page builder elements.