I have a staging site where we do our work and show to clients.  The site was created before I started and it wasn't set up with a disallow / in robots.txt or a meta no-index before it was created, so some pages are showing up in a Google search.Our staging site URL is formatted like this:  staging.sub.example.com.  However, one of the links that is showing up in google search if formatted like:  staging.example.com/mypage.  It's missing the sub part.  Conversely, the other 5 URLs that appear in the Google search are showing up with the correct sub part.Why did Google index the URL incorrectly for that one page?To my knowledge, staging.example.com/mypage was never a valid URL, but somehow, Google is finding it and it's actually referencing the information that is on staging.sub.example.com/mypage.How do I stop Google from displaying the page with the incorrect subdomain?
Incorrect subdomain of staging site showing up in Google SERP
google search;subdomain;indexing;serps