无法使用boto3撤销非默认专有网络的\u入口

AWS Lambda/python 2.7/boto3版本

我正在试图从一个安全组的许多规则中撤销一个规则( SG_we_are_working_with )但接收错误

发生了一个错误(InvalidGroup.NotFound)打电话给 RevokeSecurityGroupIngress操作:安全组“sg-xxxxx”

SG_we_are_working_with = 'sg-xxxxx'
SG_which_is_the_source_of_the_traffic = 'sg-11111111'
VpcId = 'vpc-2222222'

#first I load the group to find the necessary rule
ec2 = boto3.resource('ec2')
security_group = ec2.SecurityGroup(SG_we_are_working_with)
security_group.load()   # get current data

# here is loop over rules
for item in security_group.ip_permissions:

{ 
"PrefixListIds": [], 
"FromPort": 6379, 
"IpRanges": [], 
"ToPort": 11211, 
"IpProtocol": "tcp", 
"UserIdGroupPairs": [ { 
    "UserId": "00111111111", 
    "Description": "my descr", 
    "GroupId": "sg-11111111" 
} ], 
"Ipv6Ranges": [] 
}

# now attempt to delete, the necessary data is in 'item' variable:
IpPermissions=[
    {
        'FromPort': item['FromPort'],
        'ToPort': item['ToPort'],
        'IpProtocol': 'tcp',
        'UserIdGroupPairs': [
            {
                'Description': item['UserIdGroupPairs'][0]["Description"],
                'GroupId': item['UserIdGroupPairs'][0]["GroupId"],
                'UserId': item['UserIdGroupPairs'][0]["UserId"],
                'VpcId': str(VpcId)
            },
        ]
    }
]
security_group.revoke_ingress(
    FromPort =  item['FromPort'],
    GroupName = SG_we_are_working_with,
    IpPermissions = IpPermissions,
    IpProtocol = 'tcp',
    SourceSecurityGroupName = SG_which_is_the_source_of_the_traffic,
    ToPort = item['ToPort']
)

我用的是 here

我做错什么了?

非常感谢。