LookupError: No installed app with label 'core'

Initially the project used django 1.7 but I am migrating it to django 1.10.3, but when I try to use migrate it informs this error that the 'core' is not installed, unfortunately there is no core application in my program! the only thing with that name and a folder with some applications inside, and I just put their way, but I think this is not accepted in django 1.10.3, what would be the new method of doing this? or get rid of that mistake?

Edit: Error

Traceback (most recent call last):
  File "/usr/local/lib/python3.5/dist-packages/django/apps/registry.py", line 148, in get_app_config
    return self.app_configs[app_label]
KeyError: 'core'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "manage.py", line 22, in <module>
    execute_from_command_line(sys.argv)
  File "/usr/local/lib/python3.5/dist-packages/django/core/management/__init__.py", line 367, in execute_from_command_line
    utility.execute()
  File "/usr/local/lib/python3.5/dist-packages/django/core/management/__init__.py", line 359, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)

  File "/usr/local/lib/python3.5/dist-packages/django/core/management/base.py", line 294, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/usr/local/lib/python3.5/dist-packages/django/core/management/base.py", line 342, in execute
    self.check()
  File "/usr/local/lib/python3.5/dist-packages/django/core/management/base.py", line 374, in check
    include_deployment_checks=include_deployment_checks,
  File "/usr/local/lib/python3.5/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/python3.5/dist-packages/django/core/management/base.py", line 361, in _run_checks
    return checks.run_checks(**kwargs)
  File "/usr/local/lib/python3.5/dist-packages/django/core/checks/registry.py", line 81, in run_checks
    new_errors = check(app_configs=app_configs)
File "/usr/local/lib/python3.5/dist-packages/django/contrib/auth/checks.py", line 16, in check_user_model
    cls = apps.get_model(settings.AUTH_USER_MODEL)
  File "/usr/local/lib/python3.5/dist-packages/django/apps/registry.py", line 195, in get_model
    return self.get_app_config(app_label).get_model(model_name.lower())
  File "/usr/local/lib/python3.5/dist-packages/django/apps/registry.py", line 155, in get_app_config
    raise LookupError(message)
LookupError: No installed app with label 'core'.