(venv) D:\web\demo>python manage.py makemigrations

Traceback (most recent call last):

  File "manage.py", line 15, in <module>

    execute_from_command_line(sys.argv)

  File "d:\web\venv\lib\site-packages\django\core\management\__init__.py", line 371, in execute_from_command_line

    utility.execute()

  File "d:\web\venv\lib\site-packages\django\core\management\__init__.py", line 347, in execute

    django.setup()

  File "d:\web\venv\lib\site-packages\django\__init__.py", line 24, in setup

    apps.populate(settings.INSTALLED_APPS)

  File "d:\web\venv\lib\site-packages\django\apps\registry.py", line 112, in populate

    app_config.import_models()

  File "d:\web\venv\lib\site-packages\django\apps\config.py", line 198, in import_models

    self.models_module = import_module(models_module_name)

  File "d:\web\venv\lib\importlib\__init__.py", line 126, in import_module

    return _bootstrap._gcd_import(name[level:], package, level)

  File "<frozen importlib._bootstrap>", line 994, in _gcd_import

  File "<frozen importlib._bootstrap>", line 971, in _find_and_load

  File "<frozen importlib._bootstrap>", line 955, in _find_and_load_unlocked

  File "<frozen importlib._bootstrap>", line 665, in _load_unlocked

  File "<frozen importlib._bootstrap_external>", line 678, in exec_module

  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed

  File "D:\web\demo\app1\models.py", line 4, in <module>

    class CreateUpdate(models.Model):

  File "d:\web\venv\lib\site-packages\django\db\models\base.py", line 114, in __new__

    new_class.add_to_class('_meta', Options(meta, app_label))

  File "d:\web\venv\lib\site-packages\django\db\models\base.py", line 315, in add_to_class

    value.contribute_to_class(cls, name)

  File "d:\web\venv\lib\site-packages\django\db\models\options.py", line 197, in contribute_to_class

    raise TypeError("'class Meta' got invalid attribute(s): %s" % ','.join(meta_attrs))

TypeError: 'class Meta' got invalid attribute(s): abstarct