Event: You cannot configure an Elastic Beanstalk environment with values for both the Elastic Load Balancing Target option and Application Healthcheck URL option
Target option in the
aws:elb:healthcheck namespace is
deprecated. Remove the
Target option namespace) from your environment and try
Event: ELB cannot be attached to multiple subnets in the same AZ.
This message can be seen if you try to move a load balancer between subnets in the same Availability Zone. Changing subnets on the load balancer requires moving it out of the original availability zone(s) and then back into the original with the desired subnets. During the process, all of your instances will be migrated between AZs, causing significant downtime. Instead, consider creating a new environment and perform a CNAME swap.