es error

{'answers': {'23': '',
             '24': 'fdgf',
             '25': None,
             '26': None,
             '27': None,
             '29': '0'},
 'author': {'first_name': 'Pranay', 'id': 1, 'last_name': 'Uttara'},
 'branch_id': 2,
 'comments': [],
 'created': datetime.datetime(2017, 10, 13, 22, 12, 18),
 'modified': datetime.datetime(2017, 10, 13, 22, 12, 18),
 'resident': {'first_name': 'Vijay', 'id': 6, 'last_name': 'Gobind'}}
PUT http://localhost:9200/form-7/_doc/31 [status:400 request:0.004s]
Traceback (most recent call last):
  File "migrate_completed_forms.py", line 56, in <module>
    body=doc)
  File "/home/r3b311i0n/.pyenv/versions/viduthi-backend/lib/python3.6/site-packages/elasticsearch/client/utils.py", line 76, in _wrapped
    return func(*args, params=params, **kwargs)
  File "/home/r3b311i0n/.pyenv/versions/viduthi-backend/lib/python3.6/site-packages/elasticsearch/client/__init__.py", line 319, in index
    _make_path(index, doc_type, id), params=params, body=body)
  File "/home/r3b311i0n/.pyenv/versions/viduthi-backend/lib/python3.6/site-packages/elasticsearch/transport.py", line 318, in perform_request
    status, headers_response, data = connection.perform_request(method, url, params, body, headers=headers, ignore=ignore, timeout=timeout)
  File "/home/r3b311i0n/.pyenv/versions/viduthi-backend/lib/python3.6/site-packages/elasticsearch/connection/http_urllib3.py", line 185, in perform_request
    self._raise_error(response.status, raw_data)
  File "/home/r3b311i0n/.pyenv/versions/viduthi-backend/lib/python3.6/site-packages/elasticsearch/connection/base.py", line 125, in _raise_error
    raise HTTP_EXCEPTIONS.get(status_code, TransportError)(status_code, error_message, additional_info)
elasticsearch.exceptions.RequestError: TransportError(400, 'mapper_parsing_exception', 'failed to parse [answers.29]')