stacktrace

Traceback (most recent call last):
  File "/Users/mac/PycharmProjects/testmbfunctions/virenv/lib/python3.6/site-packages/celery/app/trace.py", line 382, in trace_task
    R = retval = fun(*args, **kwargs)
  File "/Users/mac/PycharmProjects/testmbfunctions/virenv/lib/python3.6/site-packages/celery/app/trace.py", line 641, in __protected_call__
    return self.run(*args, **kwargs)
  File "/Users/mac/PycharmProjects/testmbfunctions/testpro/testapp/tasks.py", line 43, in get_events
    ma, created = Ma.objects.update_or_create(market_id=market_id)
  File "/Users/mac/PycharmProjects/testmbfunctions/virenv/lib/python3.6/site-packages/django/db/models/manager.py", line 82, in manager_method
    return getattr(self.get_queryset(), name)(*args, **kwargs)
  File "/Users/mac/PycharmProjects/testmbfunctions/virenv/lib/python3.6/site-packages/django/db/models/query.py", line 559, in update_or_create
    obj, created = self._create_object_from_params(kwargs, params, lock=True)
  File "/Users/mac/PycharmProjects/testmbfunctions/virenv/lib/python3.6/site-packages/django/db/models/query.py", line 583, in _create_object_from_params
    raise e
  File "/Users/mac/PycharmProjects/testmbfunctions/virenv/lib/python3.6/site-packages/django/db/models/query.py", line 575, in _create_object_from_params
    obj = self.create(**params)
  File "/Users/mac/PycharmProjects/testmbfunctions/virenv/lib/python3.6/site-packages/django/db/models/query.py", line 422, in create
    obj.save(force_insert=True, using=self.db)
  File "/Users/mac/PycharmProjects/testmbfunctions/virenv/lib/python3.6/site-packages/django/db/models/base.py", line 741, in save
    force_update=force_update, update_fields=update_fields)
  File "/Users/mac/PycharmProjects/testmbfunctions/virenv/lib/python3.6/site-packages/django/db/models/base.py", line 779, in save_base
    force_update, using, update_fields,
  File "/Users/mac/PycharmProjects/testmbfunctions/virenv/lib/python3.6/site-packages/django/db/models/base.py", line 870, in _save_table
    result = self._do_insert(cls._base_manager, using, fields, update_pk, raw)
  File "/Users/mac/PycharmProjects/testmbfunctions/virenv/lib/python3.6/site-packages/django/db/models/base.py", line 908, in _do_insert
    using=using, raw=raw)
  File "/Users/mac/PycharmProjects/testmbfunctions/virenv/lib/python3.6/site-packages/django/db/models/manager.py", line 82, in manager_method
    return getattr(self.get_queryset(), name)(*args, **kwargs)
  File "/Users/mac/PycharmProjects/testmbfunctions/virenv/lib/python3.6/site-packages/django/db/models/query.py", line 1186, in _insert
    return query.get_compiler(using=using).execute_sql(return_id)
  File "/Users/mac/PycharmProjects/testmbfunctions/virenv/lib/python3.6/site-packages/django/db/models/sql/compiler.py", line 1335, in execute_sql
    cursor.execute(sql, params)
  File "/Users/mac/PycharmProjects/testmbfunctions/virenv/lib/python3.6/site-packages/django/db/backends/utils.py", line 99, in execute
    return super().execute(sql, params)
  File "/Users/mac/PycharmProjects/testmbfunctions/virenv/lib/python3.6/site-packages/django/db/backends/utils.py", line 67, in execute
    return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)
  File "/Users/mac/PycharmProjects/testmbfunctions/virenv/lib/python3.6/site-packages/django/db/backends/utils.py", line 76, in _execute_with_wrappers
    return executor(sql, params, many, context)
  File "/Users/mac/PycharmProjects/testmbfunctions/virenv/lib/python3.6/site-packages/django/db/backends/utils.py", line 84, in _execute
    return self.cursor.execute(sql, params)
  File "/Users/mac/PycharmProjects/testmbfunctions/virenv/lib/python3.6/site-packages/django/db/utils.py", line 89, in __exit__
    raise dj_exc_value.with_traceback(traceback) from exc_value
  File "/Users/mac/PycharmProjects/testmbfunctions/virenv/lib/python3.6/site-packages/django/db/backends/utils.py", line 84, in _execute
    return self.cursor.execute(sql, params)
  File "/Users/mac/PycharmProjects/testmbfunctions/virenv/lib/python3.6/site-packages/django/db/backends/sqlite3/base.py", line 383, in execute
    return Database.Cursor.execute(self, query, params)
django.db.utils.IntegrityError: NOT NULL constraint failed: testapp_ma.volume