Ghost pages and stale archives often reappear in search results through...

https://www.scribd.com/document/1016381165/Why-Do-Old-Content-Problems-Show-Up-at-the-Worst-Possible-Time-205018

Ghost pages and stale archives often reappear in search results through unexpected caching, harming your site’s authority. When legacy content resurfaces, it confuses users and dilutes your SEO performance