Fixed crawl errors reappearing
Crawl errors marked as Fixed may reappear in the list if the underlying problem isn't resolved.
On the Crawl Errors page, you can mark an error for a specific URL as fixed. This tells Google that you no longer want to see this issue, and removes the URL from the list.
However, unless you resolve the underlying issue, the marked crawl error will reappear the next time Googlebot crawls that URL.