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How can I rename a project which has its state at <http://app.pulumi.com|app.pulumi.com>?
I've destroyed stack resources, but when I change the name in Pulumi.yaml, `pulumi preview` doesn't list stacks anymore. If I revert name change, select stack lists correctly.
How can I _migrate_ an existing stack to use the new project name?

Tried to follow <https://github.com/pulumi/pulumi/issues/950>, but I can't find any relevant stacks in `~/.pulumi` . This is because I'm hosting state at <http://app.pulumi.com|app.pulumi.com>?

If all the stack resources are gone, then do you need the stacks? You can just `pulumi stack init ...` to create them in the new project name. You will also need to `pulumi stack rm` in the old project.

But if you want to rename a project (which works even if you haven't deleted the resources) then you can use `pulumi stack rename`.

There's a little comment in the help output:
&gt; You can also rename the stack's project by passing a fully-qualified stack name as well. For example:
&gt; 'robot-co/new-project-name/production'. However in order to update the stack again, you would also need
&gt; to update the name field of Pulumi.yaml, so the project names match.