Duplicate config errors in templates

[joeduffy]

I noticed a few templates issue errors about duplicate configuration.

For example, take a fresh $ pulumi new kubernetes-gcp-yaml -y. It works fine on 3.45.0; however, after an upgrade, I see:

  pulumi:pulumi:Stack (gkek8s-dev):
    error: an unhandled error occurred: 1 error occurred:
    	*
    -error: <nil>: found duplicate config gcp:project;
    -error: <nil>: found duplicate config gcp:region;

Is that because the template itself defines the configuration keys, as well as the dev file? Isn't that how default config works, though? The project-wide YAML file can define configuration keys/values, and individual stacks can override them?

Deleting those two configuration keys from the Pulumi.yaml file and leaving them as-is in Pulumi.dev.yaml fixes the issue.

I assume this could be a bug that belongs in pulumi/pulumi, but figured I'd start by filing here since it is affecting templates.