HTTP POST requests may contain a message body, also known as the request payload. If a client sends an HTTP POST request with a request body and the server responds with a 409 Conflict status code, the client should not automatically resend the request. The 409 Conflict status code indicates that the request cannot be completed due to a conflict with the current state of the resource. Resending the request with the same request body will likely result in the same 409 Conflict status code.
To avoid the 409 Conflict status code, the client should check the response from the server to see if the request was successful. If the request was successful, the client should not resend the request. If the request was not successful, the client should check the response body for more information about the error. The response body may contain information about why the request failed and what the client can do to fix the error.
