Google said the URLs or items in the Search Console report are no longer grouped at the top level by three or more status categories, i.e. Valid, Warning, and Error. Now they are grouped or classified into two more broad statuses that reflect whether those URLs or items are invalid or not. Google said invalid means that there is a report-specific critical issue in the page or item, and not invalid means that the item might still contain warnings, but has no critical issues.
