What is the HTTP status code for duplicate record?

If server just point the duplicate, look at 4xx: 400 Bad Request – when the server will not process a request because it’s obvious client fault. 409 Conflict – if the server will not process a request, but the reason for that is not the client’s fault.

How do you fix 422 Unprocessable entity?

The 422 Unprocessable Entityerror code can be caused by malware, security problems with the site, or a script not running properly. The fix is usually to contact your hosting provider and/or developer for assistance. If you’re a website owner, knowing all types of HTTP status codes is critical.

What is a 409 conflict?

The HTTP 409 Conflict response status code indicates a request conflict with current state of the target resource. Conflicts are most likely to occur in response to a PUT request.

What causes a 422 error?

A 422 status code occurs when a request is well-formed, however, due to semantic errors it is unable to be processed. For example, this error condition may occur if an XML request body contains well-formed (i.e., syntactically correct), but semantically erroneous, XML instructions.

How can an Unprocessable entity be resolved?

To solve this, you should always make sure to set the correct content type when posting data. In this case, you should set the Content-Type header to application/json when sending any JSON-formatted data to Redmine. Note that in principal, you can send XML data to Redmine and get JSON back.

What is 405 Method not allowed?

The HyperText Transfer Protocol (HTTP) 405 Method Not Allowed response status code indicates that the request method is known by the server but is not supported by the target resource.

What is a 300 response code?

The HTTP 300 Multiple Choices redirect status response code indicates that the request has more than one possible responses. If the server has a preferred choice, it should generate a Location header.