GET request with invalid URL parameter

URL param: /mnn.json

Request

GET /api/1.0/registry/mnn.json HTTP/1.0
Authorization: Basic YnJva2VybmFtZTpicm9rZXJuYW1l
Host: medicines-registry-sandbox.prozorro.gov.ua

Response

HTTP/1.0 400 Bad Request
Content-Type: application/json

{
  "message": "URL parameter \"mnn\" not valid. URL parameter must be \"inn.json\", \"atc.json\", \"inn2atc.json\" or \"atc2inn.json\"",
  "success": false,
  "error": true
}