The HTTP 409 Conflict
response status code indicates a request conflict with current state of the server.
Conflicts are most likely to occur in response to a PUT
request. For example, you may get a 409 response when uploading a file which is older than the one already on the server resulting in a version control conflict.
Status
409 Conflict
Specifications
Specification | Title |
---|---|
RFC 7231, section 6.5.8: 409 Conflict | Hypertext Transfer Protocol (HTTP/1.1): Semantics and Content |