Sometime ago I've setup a Wordpress site with Divi installed. The actual building of the site was done by a girlfriend of my who runs a small company. I only assist when problems arise and now there is a problem with duplicate pages. I think she copied one page not once nut twice so now there are two duplicates. The title of the duplicate pages differ but the content doesn't. When she changes something in one duplicate the changes are immediately copied to the other duplicate. I tested it myself by adding 3 dots to a text line in one duplicate. the 3 dots then also appear in the duplicate number 2. Somehow these pages are linked to each other. How do I correct this?