Проблема при выполнении миграции

При использовании внешней БД для хранения данных

FIAS_DATABASE_ALIAS = 'fias'

DATABASE_ROUTERS = (
    'fias.routers.FIASRouter'
)

при выполнении миграции возникает ошибка

root@rancher:~/app# ./manage.py migrate
Traceback (most recent call last):
  File "./manage.py", line 22, in <module>
    execute_from_command_line(sys.argv)
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/__init__.py", line 363, in execute_from_command_line
    utility.execute()
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/__init__.py", line 355, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 283, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 327, in execute
    self.check()
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 359, in check
    include_deployment_checks=include_deployment_checks,
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/commands/migrate.py", line 62, in _run_checks
    issues.extend(super(Command, self)._run_checks(**kwargs))
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 346, in _run_checks
    return checks.run_checks(**kwargs)
  File "/usr/local/lib/python2.7/dist-packages/django/core/checks/registry.py", line 81, in run_checks
    new_errors = check(app_configs=app_configs)
  File "/usr/local/lib/python2.7/dist-packages/django/core/checks/model_checks.py", line 30, in check_all_models
    errors.extend(model.check(**kwargs))
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/base.py", line 1283, in check
    errors.extend(cls._check_fields(**kwargs))
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/base.py", line 1358, in _check_fields
    errors.extend(field.check(**kwargs))
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/fields/__init__.py", line 913, in check
    errors = super(AutoField, self).check(**kwargs)
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/fields/__init__.py", line 219, in check
    errors.extend(self._check_backend_specific_checks(**kwargs))
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/fields/__init__.py", line 321, in _check_backend_specific_checks
    if router.allow_migrate(db, app_label, model_name=self.model._meta.model_name):
  File "/usr/local/lib/python2.7/dist-packages/django/db/utils.py", line 293, in allow_migrate
    for router in self.routers:
  File "/usr/local/lib/python2.7/dist-packages/django/utils/functional.py", line 35, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "/usr/local/lib/python2.7/dist-packages/django/db/utils.py", line 251, in routers
    router = import_string(r)()
  File "/usr/local/lib/python2.7/dist-packages/django/utils/module_loading.py", line 18, in import_string
    six.reraise(ImportError, ImportError(msg), sys.exc_info()[2])
  File "/usr/local/lib/python2.7/dist-packages/django/utils/module_loading.py", line 15, in import_string
    module_path, class_name = dotted_path.rsplit('.', 1)
ImportError: f doesn't look like a module path

Debian, Django 1.11.3

Yuego / django-fias

Проблема при выполнении миграции #80