Old content often resurfaces through search engine caching, confusing visitors...

https://www.rankbookmarkings.win/when-legacy-pages-pop-up-in-search-results-or-crawl-reports-it-s-usually

Old content often resurfaces through search engine caching, confusing visitors and hurting your site’s authority. When outdated pages reappear unexpectedly, they signal that your site architecture needs a tune-up