Web page still showing up after deletion

Hi All, 

I have a webpage which is set up as a table of contents. Under that webpage I have couple other webpage with Page Template. 

All the webpages are working fine apart from one which throws me the below error.

Image may be NSFW.
Clik here to view.

Going back to CRM under the specific parent webpage I can not see/find that record. Which means it does not exist in CRM but Portals still trying to retrieve it. Hence the above error. Is that a correct assumption?

How do I actually delete/hide this webpage from the public.

Thanks,

Pavlos