responses:
  409:
    description: >
      Another request is in progress that prohibits the fulfilment of
      the current request, or the current resource state is inconsistent
      with the request.
    headers:
      Content-Type:
        description: The MIME type of the body of the response.
        type: string
        maximum: 1
        minimum: 1
      WWW-Authenticate:
        description: >
          Challenge if the corresponding HTTP request has not provided
          authorization, or error details if the corresponding HTTP
          request has provided an invalid authorization token.
        type: string
        maximum: 1
        minimum: 0
    schema:
      $ref: "../../../definitions/SOL002SOL003_def.yaml#/definitions/ProblemDetails"