Odoo Server Error
Traceback (most recent call last):
  File "/data/build/odoo/odoo/api.py", line 721, in get
    value = self._data[field][record._ids[0]]
KeyError: <NewId 0x7f8aa3167b70>

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/data/build/odoo/odoo/fields.py", line 1017, in __get__
    value = env.cache.get(record, self)
  File "/data/build/odoo/odoo/api.py", line 728, in get
    raise CacheMiss(record, field)
odoo.exceptions.CacheMiss: ('survey.survey(<NewId 0x7f8aa3167b70>,).answer_count', None)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/data/build/odoo/odoo/http.py", line 623, in _handle_exception
    return super(JsonRequest, self)._handle_exception(exception)
  File "/data/build/odoo/odoo/http.py", line 317, in _handle_exception
    raise pycompat.reraise(type(exception), exception, sys.exc_info()[2])
  File "/data/build/odoo/odoo/tools/pycompat.py", line 14, in reraise
    raise value
  File "/data/build/odoo/odoo/http.py", line 668, in dispatch
    result = self._call_function(**self.params)
  File "/data/build/odoo/odoo/http.py", line 349, in _call_function
    return checked_call(self.db, *args, **kwargs)
  File "/data/build/odoo/odoo/service/model.py", line 93, in wrapper
    return f(dbname, *args, **kwargs)
  File "/data/build/odoo/odoo/http.py", line 342, in checked_call
    result = self.endpoint(*a, **kw)
  File "/data/build/odoo/odoo/http.py", line 886, in __call__
    return self.method(*args, **kw)
  File "/data/build/odoo/odoo/http.py", line 514, in response_wrap
    response = f(*args, **kw)
  File "/data/build/odoo/addons/web/controllers/main.py", line 1108, in call_kw
    return self._call_kw(model, method, args, kwargs)
  File "/data/build/odoo/addons/web/controllers/main.py", line 1100, in _call_kw
    return call_kw(request.env[model], method, args, kwargs)
  File "/data/build/odoo/odoo/api.py", line 394, in call_kw
    result = _call_kw_multi(method, model, args, kwargs)
  File "/data/build/odoo/odoo/api.py", line 381, in _call_kw_multi
    result = method(recs, *args, **kwargs)
  File "/data/build/odoo/odoo/models.py", line 5889, in onchange
    snapshot1 = Snapshot(record, nametree)
  File "/data/build/odoo/odoo/models.py", line 5732, in __init__
    self.fetch(name)
  File "/data/build/odoo/odoo/models.py", line 5742, in fetch
    self[name] = record[name]
  File "/data/build/odoo/odoo/models.py", line 5412, in __getitem__
    return self._fields[key].__get__(self, type(self))
  File "/data/build/odoo/odoo/fields.py", line 1041, in __get__
    self.compute_value(recs)
  File "/data/build/odoo/odoo/fields.py", line 1122, in compute_value
    records._compute_field_value(self)
  File "/data/build/odoo/odoo/models.py", line 3782, in _compute_field_value
    getattr(self, field.compute)()
  File "/data/build/odoo/addons/survey/models/survey_survey.py", line 140, in _compute_survey_statistic
    avg_total = stat[survey.id].pop('answer_score_avg_total')
KeyError: <NewId 0x7f8aa3167b70>