Stale, forgotten content often resurfaces through search engine scraping,...

https://zulu-wiki.win/index.php/How_to_Stop_Old_Content_From_Resurfacing_When_You_Share_Links

Stale, forgotten content often resurfaces through search engine scraping, hurting your current site’s authority. When outdated pages reappear in search results, they confuse users and dilute your SEO efforts