TypeError: Object of type datetime is not JSON serializable

[sentry]

Sentry Issue: ONADATA-XPW

SerializationFailure: canceling statement due to conflict with recovery
DETAIL:  User query might have needed to see row versions that must be removed.

  File "django/db/backends/utils.py", line 105, in _execute
    return self.cursor.execute(sql, params)

OperationalError: canceling statement due to conflict with recovery
DETAIL:  User query might have needed to see row versions that must be removed.

(18 additional frame(s) were not displayed)
...
  File "onadata/apps/api/viewsets/dataview_viewset.py", line 261, in form_details
    return Response(data=serializer.data, content_type="application/json")
  File "onadata/libs/serializers/xform_serializer.py", line 614, in get_form_versions
    versions = list(

TypeError: Object of type datetime is not JSON serializable
(4 additional frame(s) were not displayed)
...
  File "onadata/libs/renderers/renderers.py", line 575, in render
    return json.dumps(data)

[linear]

ONADATA-1332

[sentry]

Sentry Issue: ONADATA-XGX