It happens to every site: old, irrelevant pages start ranking again, hurting...

https://blogfreely.net/murciajpvo/h1-b-the-ghost-problem-why-that-outdated-staff-bio-wont-die-and-how-to

It happens to every site: old, irrelevant pages start ranking again, hurting your current SEO authority. This is often caused by search engines rediscovering legacy files from deep archives you thought were long gone