Django 2-添加用户错误-具有此名称的组已存在

当我尝试添加一个具有组列表的用户时，会出现一个错误，指出“具有此名称的组已存在”。这是我的爱人：

{
 'email': 'test@test.com',
 'first_name': 'Bob',
 'last_name': 'Jones',
 'groups': [{'url': 'http://localhost:8000/api/groups/1/', 'name': 'Admin'}]
}

序列化程序.py

class GroupSerializer(serializers.HyperlinkedModelSerializer):
    """
    Serializer to interact with the Groups model.
    """
    class Meta:
        model = Group
        fields = ('url', 'name', 'id')

class UserSerializer(serializers.HyperlinkedModelSerializer):
    """
    Serializer to interact with the Users model.
    """
    url = serializers.HyperlinkedIdentityField(view_name='users-detail')
    groups = GroupSerializer(many=True)
    class Meta:
        model = User
        fields = ('id', 'url', 'username', 'email',
              'groups', 'first_name', 'last_name', 'is_superuser', 'is_staff', 'is_active')

class UserViewSet(viewsets.ModelViewSet):
    """
    API endpoint that allows users to be viewed or edited.
    """
    serializer_class = UserSerializer
    queryset = User.objects.all()
    def create(self, request, *args, **kwargs):
        serializer = self.get_serializer(data=request.data)
        serializer.is_valid(raise_exception=True)
        self.perform_create(serializer)
        headers = self.get_success_headers(serializer.data)
        return Response(serializer.data, status=status.HTTP_201_CREATED, headers=headers)

视图.py

class GroupSerializer(serializers.HyperlinkedModelSerializer):
    """
    Serializer to interact with the Groups model.
    """
    class Meta:
        model = Group
        fields = ('url', 'name', 'id')

class UserSerializer(serializers.HyperlinkedModelSerializer):
    """
    Serializer to interact with the Users model.
    """
    url = serializers.HyperlinkedIdentityField(view_name='users-detail')
    groups = GroupSerializer(many=True)
    class Meta:
        model = User
        fields = ('id', 'url', 'username', 'email',
              'groups', 'first_name', 'last_name', 'is_superuser', 'is_staff', 'is_active')

class UserViewSet(viewsets.ModelViewSet):
    """
    API endpoint that allows users to be viewed or edited.
    """
    serializer_class = UserSerializer
    queryset = User.objects.all()
    def create(self, request, *args, **kwargs):
        serializer = self.get_serializer(data=request.data)
        serializer.is_valid(raise_exception=True)
        self.perform_create(serializer)
        headers = self.get_success_headers(serializer.data)
        return Response(serializer.data, status=status.HTTP_201_CREATED, headers=headers)

---

删除组名的验证程序：

class GroupSerializer(serializers.HyperlinkedModelSerializer):
    class Meta:
        model = Group
        fields = ('name',)
        extra_kwargs = {
            'name': {'validators': []},
        }