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What's broken? The message says that the resource already exists.

Was it created outside Pulumi and now you want Pulumi to manage it? You need to import it.

Should it not exist, because you want Pulumi to create it? Delete it in the Route53 console.

pulumi deployment was accidentally interrupted
I tried to export and import stack
dint help so i tried removing stack and retry

i am dont see that resource under Route53 console too

It's there, somewhere. That error is from AWS, not Pulumi. The CNAME record exists in Route53 and Pulumi can't create it.