Documentation lacking how to handle scenario for pre-bootstrapped environments...

**[Amplify Docs - Bootstrap your AWS account](https://docs.amplify.aws/react/start/account-setup/#5-bootstrap-your-aws-account)**

The documentation doesn't provide information on the error that will present in the console if the AWS account already has a CDKToolkit: `Stack [CDKToolkit] already exists`

If the account was bootstrapped previously, the option to initiate the first-time setup does not appear when going through the steps to create an Amplify application. The option does not appear before clicking through to create the new app, which then leads to the `Stack [CDKToolkit] already exists` error.

I found that [this GitHub issue](https://github.com/aws-amplify/amplify-backend/issues/777#issuecomment-1842088587) provides a solution to move past this error. You can open Cloudshell and run `cdk bootstrap aws://ACCOUNT-NUMBER-1/REGION-1`to update the bootstrap stack to a new version. Once this is done, the error no longer appears, and the app creates successfully.

I think it would benefit users of the Amplify service to have a section in the documentation that mentions this error and how to move past it.