Trying to edit link and delete it.

I have a problem every time I open my excel doc I am about present to my supervisor a message pops up that states, "This workbook contains links to other data sources *If you update the links, excel will attempt to retrieve the latest data * If you don't update the links, excel will use the previous information." - if this pop up would stop that would be great. The name of the link I am trying to remove or edit is (Team Newman Tracker 2018.xlsx)- I have clicked break link I also tried to locate the link in name manager and couldn't figure it out. If I could remove this this doc would be done. Please help as I am mostly a novis when it comes to excel.