Stale content often reappears in search results via legacy cache files or...

https://record-wiki.win/index.php/What_is_the_Difference_Between_Caching_and_Archiving%3F_Managing_Your_Digital_Footprint

Stale content often reappears in search results via legacy cache files or outdated archives, potentially confusing your users and diluting your authority. If you’re seeing ghost pages pop up, it’s time to perform a comprehensive content audit