django.core.exceptions.ImproperlyConfigured: Application labels aren't unique, duplicates: rest_framework_swagger

在启动服务时报django.core.exceptions.ImproperlyConfigured: Application labels aren't unique, duplicates: rest_framework_swagger错误

错误解释：应用程序标签不是唯一的，重复的rest_framework_swagger

setting.py配置：

    'rest_framework',
    'rest_framework_swagger',
    'rest_framework.authtoken',
    'rest_framework_swagger',

rest_framework_swagger配置重复了，去掉一个即可