When old content resurfaces through unexpected web caching, it can confuse your...

https://stateofseo.com/should-i-301-redirect-old-urls-or-leave-a-404-the-reality-of-content-decay/

When old content resurfaces through unexpected web caching, it can confuse your audience and dilute your SEO authority. Instead of letting legacy pages linger, take control by performing a content audit to identify what’s still live