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I tried
```pulumi stack import --file dev.checkpoint.json```
It's a checkpoint file i edited I got following error after wanting to pulumi preview:

error: .pulumi/stacks/dev.json: snapshot integrity failure; refusing to use it: resource urn:pulumi:dev::ls::digitalocean:index/kubernetesCluster:KubernetesCluster::staging refers to unknown provider urn:pulumi:dev::ls::pulumi:providers:digitalocean::default_1_6_0::*charactersequence*

I am positive i did not change "provider" and that cluster is still running on DO cloud. Does anyone have an idea what I might've done wrong or how i can fix this?