Posted By Joe Craig on 19 Aug 2019 10:44 PM
If this is DNN 9.x, you'll need to check and change the page URLs, too ... I think. On the Advanced tab from Pages, click the S.E.O. sub-tab and fix the offending URL(s).
As Joe mentioned, DNN keeps track of previous URLs this way. This helps to address SEO issues when non-technical end-users change the name of a page without realizing the impact it has on internal and external links. Power users will know this and should follow the steps outlined by Joe. Have fun DNN-ing! :)