Old Page Showing Up But Can't Find to Delete It

Site URL: https://www.nationaltab.com/new-page-85

I have an old draft page on my website that must have been enabled and is showing up in search engines. When I go through my Squarespace site, I can't find the page that I want to remove. I checked my deleted pages folder, but it's not showing up there. 

If I already deleted the page, but it was enabled, could that be why it's still showing up?

It will leave the search engines eventually, it gives an error now with the link of course.