Permalink name changes on edit

Everytome I go to edit one of my pages the permalink name will change to test-track i.e readingroadrunners.org/coaches will change to readingroadrunners.org/test-track once I’ve updated the page I notice the change and need to manually change it back. I do create a page with that permalink to
See if it would stop problem but the name
test-track2 was now created instead. I can’t find the name test-track anywhere in the permalink settings as all looks as normal. I did create a page with that name a while ago and deleted it. Any help appreciated. Thanks