cfn-vpc-cidr-change-requires-replacement

Status: IN

Changing the `CidrBlock` or `Ipv4IpamPoolId` on an `AWS::EC2::VPC` resource requires replacement — a new VPC is created.

Source: entries/2026/03/11/AWSCloudFormation-latest-UserGuide-aws-resource-ec2-vpchtml.md

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