You may not specify a referenced group id for an existing IPv4 CIDR rule. prompt when editing the Inbound rule in AWS Security Group
In AWS EC2, I start a Classical Load Balancer in front of EC2 instance (security group of EC2 instance is launch-wizard-3 ). I want to change the inbound rule of Security Group of EC2 instance . A security group for Classical Load Balancer (its name is my-first-load-balancer-sg ) was also started. When I am changing source of an inbound rule of launch-wizard