При создании супер юзера появляется ошибка ValueError: invalid literal for int() with base 10: 'admin'

Traceback (most recent call last):
  File "manage.py", line 22, in <module>
    execute_from_command_line(sys.argv)
  File "c:\python36\project\venv\lib\site-packages\django\core\management\__init__.py", line 363, in execute_from_command_line
    utility.execute()
  File "c:\python36\project\venv\lib\site-packages\django\core\management\__init__.py", line 355, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "c:\python36\project\venv\lib\site-packages\django\core\management\base.py", line 283, in run_from_argv
    self.execute(*args, **cmd_options)
  File "c:\python36\project\venv\lib\site-packages\django\contrib\auth\management\commands\createsuperuser.py", line 63, in execute
    return super(Command, self).execute(*args, **options)
  File "c:\python36\project\venv\lib\site-packages\django\core\management\base.py", line 330, in execute
    output = self.handle(*args, **options)
  File "c:\python36\project\venv\lib\site-packages\django\contrib\auth\management\commands\createsuperuser.py", line 183, in handle
    self.UserModel._default_manager.db_manager(database).create_superuser(**user_data)
  File "c:\python36\project\lolts\cabinet\models.py", line 31, in create_superuser
    is_admin = True)
  File "c:\python36\project\lolts\cabinet\models.py", line 17, in create_user
    user_obj.save(using=self._db)
  File "c:\python36\project\venv\lib\site-packages\django\contrib\auth\base_user.py", line 80, in save
    super(AbstractBaseUser, self).save(*args, **kwargs)
  File "c:\python36\project\venv\lib\site-packages\django\db\models\base.py", line 806, in save
    force_update=force_update, update_fields=update_fields)
  File "c:\python36\project\venv\lib\site-packages\django\db\models\base.py", line 836, in save_base
    updated = self._save_table(raw, cls, force_insert, force_update, using, update_fields)
  File "c:\python36\project\venv\lib\site-packages\django\db\models\base.py", line 903, in _save_table
    forced_update)
  File "c:\python36\project\venv\lib\site-packages\django\db\models\base.py", line 933, in _do_update
    filtered = base_qs.filter(pk=pk_val)
  File "c:\python36\project\venv\lib\site-packages\django\db\models\query.py", line 784, in filter
    return self._filter_or_exclude(False, *args, **kwargs)
  File "c:\python36\project\venv\lib\site-packages\django\db\models\query.py", line 802, in _filter_or_exclude
    clone.query.add_q(Q(*args, **kwargs))
  File "c:\python36\project\venv\lib\site-packages\django\db\models\sql\query.py", line 1261, in add_q
    clause, _ = self._add_q(q_object, self.used_aliases)
  File "c:\python36\project\venv\lib\site-packages\django\db\models\sql\query.py", line 1287, in _add_q
    allow_joins=allow_joins, split_subq=split_subq,
  File "c:\python36\project\venv\lib\site-packages\django\db\models\sql\query.py", line 1221, in build_filter
    condition = self.build_lookup(lookups, col, value)
  File "c:\python36\project\venv\lib\site-packages\django\db\models\sql\query.py", line 1115, in build_lookup
    return final_lookup(lhs, rhs)
  File "c:\python36\project\venv\lib\site-packages\django\db\models\lookups.py", line 24, in __init__
    self.rhs = self.get_prep_lookup()
  File "c:\python36\project\venv\lib\site-packages\django\db\models\lookups.py", line 74, in get_prep_lookup
    return self.lhs.output_field.get_prep_value(self.rhs)
  File "c:\python36\project\venv\lib\site-packages\django\db\models\fields\__init__.py", line 966, in get_prep_value
    return int(value)
ValueError: invalid literal for int() with base 10: 'admin'

class UserManager(BaseUserManager):
    def create_user(self, login, about=None, password=None,  is_staff=False, is_active=True, is_admin=False):
        if not login:
            raise ValueError("Вы обязаны иметь логин, будет прекрасно если он будет совпадать с вашим игровым ником.")
        if not password:
            raise ValueError("Ну, вы чего? А пароль кто за вас введет?")
        user_obj = self.model(login)
        user_obj.set_password(password)
        user_obj.about = about
        user_obj.staff = is_staff
        user_obj.admin = is_admin
        user_obj.active =  is_active
        user_obj.save(using=self._db)
        return user_obj
    def create_staffuser(self, login, password=None):
        user = self.create_user(
            login,
            password = password,
            is_staff = True)
        return user
 
    def create_superuser(self, login, password=None):
        user = self.create_user(
            login,
            password=password,
            is_staff= True,
            is_admin = True)
        return user
 
 
class CustomUser(AbstractBaseUser):
    login    = models.CharField(max_length=255, blank=False, unique=True)
    about    = models.TextField(blank=True)
    active   = models.BooleanField(default=True)
    admin    = models.BooleanField(default=False)
    staff    = models.BooleanField(default=False)
    USERNAME_FIELD    = 'login'
    
    objects = UserManager()
    def __str__(self):
        return self.login
    
    def get_name(self):
        return self.login
    def has_perm(self, perm, obj=None):
        return True
    def has_module_perms(self, app_label):
        return True
    @property
    def is_active(self):
        return self.active
    @property
    def is_admin(self):
        return is_admin
    @property
    def is_staff(self):
        return self.staff
 
class GuestLogin(models.Model):
    login = models.CharField(max_length=255)
    active = models.BooleanField(default=True)
 
    def __str__(self):
        return self.login