Empty 'tenant_id' field in cloudkitty hashmap-mapping-create

When I try to create a new mapping from command line, the 'tenat_id' field in the request body is always empty, even whit the -p (project-id) option in the command line:

cloudkitty -d -v hashmap-mapping-create -s cc15e3ac-650a-495c-a9fd-2e830eb73d2e -p c862f0bec0094fa29d51b77b9bdb0fa2 -c 2
DEBUG (extension) found extension EntryPoint.parse('hashmap = cloudkittyclient.v1.rating.hashmap.extension:Extension')
DEBUG (extension) found extension EntryPoint.parse('pyscripts = cloudkittyclient.v1.rating.pyscripts.extension:Extension')
DEBUG (extension) found extension EntryPoint.parse('hashmap = cloudkittyclient.v1.rating.hashmap.extension:Extension')
DEBUG (extension) found extension EntryPoint.parse('pyscripts = cloudkittyclient.v1.rating.pyscripts.extension:Extension')
DEBUG (session) REQ: curl -g -i -X GET http://192.168.83.189:5000/v2.0 -H "Accept: application/json" -H "User-Agent: python-keystoneclient"
INFO (connectionpool) Starting new HTTP connection (1): 192.168.83.189
DEBUG (connectionpool) "GET /v2.0 HTTP/1.1" 200 348
DEBUG (session) RESP: [200] Date: Thu, 25 Aug 2016 08:42:59 GMT Server: Apache/2.4.7 (Ubuntu) Vary: X-Auth-Token x-openstack-request-id: req-26e99843-dc56-43bc-8abe-d533eb365789 Content-Length: 348 Keep-Alive: timeout=5, max=100 Connection: Keep-Alive Content-Type: application/json
RESP BODY: {"version": {"status": "deprecated", "updated": "2016-08-04T00:00:00Z", "media-types": [{"base": "application/json", "type": "application/vnd.openstack.identity-v2.0+json"}], "id": "v2.0", "links": [{"href": "http://192.168.83.189/identity/v2.0/", "rel": "self"}, {"href": "http://docs.openstack.org/", "type": "text/html", "rel": "describedby"}]}}

DEBUG (v2) Making authentication request to http://192.168.83.189/identity/v2.0/tokens
INFO (connectionpool) Starting new HTTP connection (1): 192.168.83.189
DEBUG (connectionpool) "POST /identity/v2.0/tokens HTTP/1.1" 200 3811
DEBUG (client) REQ: curl -g -i -X 'POST' 'http://192.168.83.189:8889/v1/rating/module_config/hashmap/mappings' -H 'User-Agent: cloudkittyclient.openstack.common.apiclient' -H 'Content-Type: application/json' -H 'X-Auth-Token: {SHA1}ee04c26e8538370497df6f96e0c5cefd3877f405'
DEBUG (client) REQ BODY: {"tenant_id": "", "cost": "2", "service_id": "cc15e3ac-650a-495c-a9fd-2e830eb73d2e"}

INFO (connectionpool) Starting new HTTP connection (1): 192.168.83.189
DEBUG (connectionpool) "POST /v1/rating/module_config/hashmap/mappings HTTP/1.1" 400 137
DEBUG (client) RESP: [400] {'Date': 'Thu, 25 Aug 2016 08:43:00 GMT', 'Content-Length': '137', 'Content-Type': 'application/json; charset=UTF-8', 'x-openstack-request-id': 'req-e1ae182a-b36e-4989-90be-b792af0188d3', 'Server': 'WSGIServer/0.1 Python/2.7.6'}

DEBUG (client) RESP BODY: {"debuginfo": null, "faultcode": "Client", "faultstring": "Invalid input for field/attribute tenant_id. Value: ''. Invalid UUID, got ''"}

DEBUG (client) Request returned failure status: 400
Traceback (most recent call last):
  File "/usr/local/bin/cloudkitty", line 10, in <module>
    sys.exit(main())
  File "/opt/stack/python-cloudkittyclient/cloudkittyclient/shell.py", line 315, in main
    CloudkittyShell().main(args)
  File "/opt/stack/python-cloudkittyclient/cloudkittyclient/shell.py", line 264, in main
    args.func(client, args)
  File "/opt/stack/python-cloudkittyclient/cloudkittyclient/v1/rating/hashmap/shell.py", line 134, in _wrapped
    return func(*args, **kwargs)
  File "/opt/stack/python-cloudkittyclient/cloudkittyclient/v1/rating/hashmap/shell.py", line 162, in do_hashmap_mapping_create
    out = cc.hashmap.mappings.create(**fields)
  File "/opt/stack/python-cloudkittyclient/cloudkittyclient/common/base.py", line 113, in create
    self.build_url(**kwargs), kwargs)
  File "/opt/stack/python-cloudkittyclient/cloudkittyclient/openstack/common/apiclient/base.py", line 178, in _post
    body = self.client.post(url, json=json).json()
  File "/opt/stack/python-cloudkittyclient/cloudkittyclient/openstack/common/apiclient/client.py", line 361, in post
    return self.client_request("POST", url, **kwargs)
  File "/opt/stack/python-cloudkittyclient/cloudkittyclient/openstack/common/apiclient/client.py", line 348, in client_request
    self, method, url, **kwargs)
  File "/opt/stack/python-cloudkittyclient/cloudkittyclient/openstack/common/apiclient/client.py", line 264, in client_request
    method, self.concat_url(endpoint, url), **kwargs)
  File "/opt/stack/python-cloudkittyclient/cloudkittyclient/openstack/common/apiclient/client.py", line 204, in request
    raise exceptions.from_response(resp, method, url)
cloudkittyclient.openstack.common.apiclient.exceptions.BadRequest: Bad Request (HTTP 400) (Request-ID: req-e1ae182a-b36e-4989-90be-b792af0188d3)