Old content has a habit of resurfacing through search engine caches long after...

https://www.foxtrot-bookmarks.win/stop-letting-zombie-content-sabotage-your-search-rankings-when-old-pages

Old content has a habit of resurfacing through search engine caches long after you’ve hit delete, causing confusion for users and SEO headaches for your team. Don't let legacy pages dilute your site’s authority