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Hello, I am trying to deploy the `aws-py-voting-app` example (<https://github.com/pulumi/examples/blob/master/aws-py-voting-app/>).

It's taking quite long and then failing with this error:
```  aws:lb:TargetGroup (redis-targetgroup):
    error: 1 error occurred:
        * creating urn:pulumi:dev::voting-app::aws:lb/targetGroup:TargetGroup::redis-targetgroup: 1 error occurred:
        * error modifying Target Group Attributes: ValidationError: 'Stickiness type' must be one of [app_cookie, lb_cookie, source_ip]
        status code: 400, request id: 9995a158-8d9b-4e97-93ed-884389a95f6d

Resources:
    + 17 created

Duration: 45m20s```
I can not make sense of this error message because 'lb_cookie' is used as type, as far as I can tell:

<https://github.com/pulumi/examples/blob/master/aws-py-voting-app/__main__.py#L130>

Any hints what the problem could be?

I think this is because `lb_cookie` isn't supported with the TCP protocol.

Thanks, without knowing what I am doing, I switched out `lb_cookie`  for `source_ip` . It works now! I think I still need to understand the change. Would this change be worth to commit to the `examples` -repo?