Good morning everyone

I am modifying an existing website at the moment and have a really basic question.

I have changed my websites php settings, so that google searches show up not only the website, but the sub headers (contact, team etc). This seems to be working well.

However also showing in google searches is the page „Download file“, leading to the page „download file, invalid file“. I‘d rather not have this showing on google if possible.

The actual page can be seen on my Sitemap tree at top level underneath „Page not Found“.

What should I do with it, to avoid it showing up on google?

From reading around this forum, it appears it could perform a useful function, so I don‘t want to simply delete or rename it without knowing the best approach!

Many thanks in advance :-)