One or more of the CNAMEs you provided are already associated with a different resource

Question

I am using https://sst.dev/ to create 2 distributions. One is hosted on `app.example.com` and the other on `example.com`. When trying to deploy the `example.com` distribution I get the error in the title.

When I go to CloudFront and check the distributions, the alternative domain names are `app.example.com` and `example.com` respectively, so everything seems fine.

When I run the command

```
aws cloudfront list-conflicting-aliases --distribution-id ABC --alias example.com --profile Production
```

then it shows the `ABC` distribution itself as conflicting. Same when I do

```
aws cloudfront list-conflicting-aliases --distribution-id DEF --alias app.example.com --profile Production
```

it will show the `DEF` contribution as the conflicting one. This doesn't make sense to me. What else could be causing this error and how do I solve it? Is there something in Route 53? There are `AAAA` records there with the `example.com` and `app.example.com` pointing to the correct CloudFront distributions.

Answer

Hello.

I think the duplicate AWS account was displayed when you executed the command below.  
Is that AWS account under your control?  
```
aws cloudfront list-conflicting-aliases --distribution-id DEF --alias *.example.com --profile Production
```

You may be able to migrate by following the steps in the document below, so please try it.  
https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/CNAMEs.html#alternate-domain-names-move

If you are unable to migrate, you will need to contact AWS Support as described in the documentation.  
> Contact AWS Support to move an alternate domain name  
If the source and target distributions are in different AWS accounts, and you don’t have access to the source distribution’s AWS account or can’t disable the source distribution, you can contact AWS Support to move the alternate domain name.

One or more of the CNAMEs you provided are already associated with a different resource

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