Django是否在这个错误消息中抱怨自己？

当我启动服务器时，我得到：

/usr/lib64/python2.7/site-packages/django/contrib/admin/util.py:7: RemovedInDjango19Warning: The django.contrib.admin.util module has been renamed. Use django.contrib.admin.utils instead.
  "Use django.contrib.admin.utils instead.", RemovedInDjango19Warning)

/usr/lib64/python2.7/site-packages/django/contrib/contenttypes/models.py:159: RemovedInDjango19Warning: Model class django.contrib.contenttypes.models.ContentType doesn't declare an explicit app_label and either isn't in an application in INSTALLED_APPS or else was imported before its application was loaded. This will no longer be supported in Django 1.9.
  class ContentType(models.Model):

/usr/lib64/python2.7/site-packages/django/contrib/admin/util.py:7: RemovedInDjango19Warning: The django.contrib.admin.util module has been renamed. Use django.contrib.admin.utils instead.
  "Use django.contrib.admin.utils instead.", RemovedInDjango19Warning)

/usr/lib64/python2.7/site-packages/django/contrib/contenttypes/models.py:159: RemovedInDjango19Warning: Model class django.contrib.contenttypes.models.ContentType doesn't declare an explicit app_label and either isn't in an application in INSTALLED_APPS or else was imported before its application was loaded. This will no longer be supported in Django 1.9.
  class ContentType(models.Model):

Performing system checks...

System check identified no issues (0 silenced).
September 14, 2015 - 19:45:18
Django version 1.8.4, using settings 'viewer.settings'
Starting development server at http://0.0.0.0:8000/
Quit the server with CONTROL-C.

---

这四个

是不是应该被忽略？我在代码中搜索了上述问题，但在代码中找不到这些问题。
对于内容类型警告，请确保您的
安装的应用程序设置中有
内容类型。这是必需的，因为项目中的某些代码（例如在django mass edit中）使用
ContentType
模型

INSTALLED_APPS = (
   ...
   'django.contrib.contenttypes',
   ...
)

另一个
django.contrib.admin.util
警告已在django mass edit中修复，但在撰写本文时还没有新版本。因为这只是一个不推荐使用的警告，所以在实际升级到Django 1.9之前，您不必担心它。
另一种可能是您安装的第三方应用程序使用了不推荐使用的内容。@Chucksash:我没有考虑过，谢谢！看起来我有很多检查要做。我发现了第一个和第三个错误的罪魁祸首：django批量编辑代码已经被修复，但从那以后似乎再也没有发布过。因为这只是一个弃用警告，你不必担心。@Alasdair:很好，我不知道，谢谢！