{"id":"cfn-vpc-cidr-change-requires-replacement","text":"Changing the `CidrBlock` or `Ipv4IpamPoolId` on an `AWS::EC2::VPC` resource requires replacement — a new VPC is created.","truth_value":"IN","source":"entries/2026/03/11/AWSCloudFormation-latest-UserGuide-aws-resource-ec2-vpchtml.md","source_url":"","source_hash":"a2ee1634d69ad9c2","justifications":[],"dependents":[],"metadata":{},"explanation":{"steps":[{"node":"cfn-vpc-cidr-change-requires-replacement","truth_value":"IN","reason":"premise"}]}}