title: AWS ELB cannot be attached to multiple subnets while it's not configured for it
body: <p>I'm experiencing an issue with <strong>AWS EB</strong> today.</p>
  
  <p>I'm trying to put an EC2 instance on 1 subnet (private) and the ELB on another one (public).</p>
  
  <p>Then since this morning, I get this error while deploying:
  Updating load balancer named: awseb-e-u-AWSEBLoa-1FULBEU6PSYPB failed Reason: <strong>ELB cannot be attached to multiple subnets in the same AZ</strong>.</p>
  
  <p>I don't understand, only one subnet is selected on my last try.</p>
  
  <p>Here is the configuration</p>
  
  <p><a href="https://i.stack.imgur.com/38tH9.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/38tH9.jpg" alt="EB Configuration"></a></p>
  
  <p>Thanks</p>