What in the world does that mean? :D
All I can tell you as far as details go is that I once created a page called "Support" and deleted that page because I got an error on it and figured I would try to start with a clean slate. After deleting that page from the recycle bin, I tried to recreate the page. Got an error message (did not look at the logs). I was running DNN 6.0.0 and thought, eh, why not upgrade to the latest version. Did that without a hitch. Tried to recreate the "Support" page and now I am getting this error, "There has a site domain same with your page path"