410 Gone
Meaning
The target resource is no longer available at the server and no forwarding address is known. This condition is expected to be permanent.
When to Use
When a resource used to exist but has been intentionally removed, and you want to inform clients that it will not be available again in the future.
Example
A specific article URL that has been deleted from a site could return 410 Gone to indicate it was intentionally removed and will not be coming back, signaling clients or search engines to remove references.
When Not to Use
Do not use for temporary unavailability (use 404 or 503 depending on the scenario). If the condition might be reversed or is not permanent, use a different status.
Source
RFC 9110