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`Type                            Name                                   Status                   Info`
     `pulumi:pulumi:Stack             stack-test-bfstack-sales               **failed**               1 error`
 `+   ├─ pulumi:providers:kubernetes  <http://k8s.eu-central-1.sales.babelforce.com|k8s.eu-central-1.sales.babelforce.com>  created`
 `+-  └─ kubernetes:core:Namespace    eu                                     **replacing failed**     [diff: ~provider]; 1 error`

`Diagnostics:`
  `kubernetes:core:Namespace (eu):`
    `error: resource eu was not successfully created by the Kubernetes API server : namespaces "eu" already exists`

  `pulumi:pulumi:Stack (stack-test-bfstack-sales):`
    `error: update failed`

while testing I just used 'dev' as the name for the provider, but now I want to change it to something more meaningful, like a cluster name

is there any way to do what I want without deleting everything and installing from scratch?

looks like aliases is the solution <https://www.pulumi.com/docs/intro/concepts/programming-model/#aliases>