Stale content has a habit of resurfacing through search engine caches or...

https://fun-wiki.win/index.php/The_Ghost_in_the_Server:_Handling_Non-Malicious_Content_That_Harms_Your_Reputation

Stale content has a habit of resurfacing through search engine caches or forgotten site archives, often confusing users and diluting your authority. If you’re seeing outdated pages pop up in rankings, it’s time for a technical cleanup