The attribute **base_manager_name** [was introduced](https://docs.djangoproject.com/en/2.0/releases/1.10/#models) in Django 1.10. There is a necessity to specify a minimal supported version in setup.py. The exception happened during `./manage.py migrate`. My Django version is 1.8.9.
The attribute base_manager_name was introduced in Django 1.10.
There is a necessity to specify a minimal supported version in setup.py.
The exception happened during
./manage.py migrate.My Django version is 1.8.9.