Unable to set api_management_api_id to null for unlinking API Management from Web App

[sametnur]

Is there an existing issue for this?

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Terraform Version

1.5.0

AzureRM Provider Version

3.0.0

Affected Resource(s)/Data Source(s)

azurerm_windows_web_app

Terraform Configuration Files

resource "azurerm_windows_web_app" "wa" {
  name                = "example-web-app"
  resource_group_name = "example-rg"
  location            = "North Europe"
  
  site_config {
    api_management_api_id = null
  }
}

Debug Output/Panic Output

1- Associate a web app with an APIM using the api_management_api_id parameter in Terraform.
2- Attempt to unlink the APIM by updating the configuration with:
   api_management_api_id = null

3- Apply the Terraform changes.

Expected Behaviour

The id field should be set to null, as follows:

"apiManagementConfig": {
"id": null
}

Actual Behaviour

The web app configuration reflects the following incorrect state:

"apiManagementConfig": {
"id": ""
}

Steps to Reproduce

To resolve the issue, I had to manually update the web app configuration using Azure CLI to set the id field to null

echo '{
"apiManagementConfig": {
"id": null
}
}' > config.json

az webapp config set --name --resource-group --generic-configurations @config.json --debug

Important Factoids

No response

References

No response