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

https://www.bookmarking-online.win/stale-content-doesn-t-just-sit-there-it-haunts-your-site-through-old-archives

Old content has a habit of resurfacing through search engine caches or forgotten archives, often hurting your current site authority. This ghost traffic can confuse users and dilute your SEO signals