Hello @Martin Stewart Thanks for posting your question on Microsoft Q&A.
The error message you're seeing indicates a potential issue with Azure Communication Service resource management. Azure Communication Services doesn't allow concurrent modifications (PUT operations) while a previous deployment is ongoing. This means that if a deployment is still in progress, renaming it in your Bicep file will fail. To address this, you can either wait for the current deployment to finish, delete and redeploy the resource, or consider using ARM templates for more control over deployments. Additionally, you can report this behavior to Microsoft through the Azure portal or support channels for further investigation.
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