What does invalid status code mean?

The 422 (Unprocessable Entity) status code means the server understands the content type of the request entity (hence a 415(Unsupported Media Type) status code is inappropriate), and the syntax of the request entity is correct (thus a 400 (Bad Request) status code is inappropriate) but was unable to process the …

For More Information Please Refer: https://stackoverflow.com/questions/6123425/rest-response-code-for-invalid-data