When legacy pages reappear in search results, it usually signals a caching...

https://lunassmartinsights.weebly.com/blog/why-cached-copies-rule-the-internet-and-why-that-should-terrify-you

When legacy pages reappear in search results, it usually signals a caching error or an overlooked archive file. These ghost pages dilute your authority and confuse users. To fix this, conduct a thorough site audit to identify these dormant assets