Lambda create_stack fails when using reserved 'aws:' tags

[sboonyakiatACR]

When launching this template from AWS Service Catalog, the CfnStackAssumeRole lambda function (QuickStartStackMakerLambda) fails due to using reserved tags. The error message the Lambda returns is as follows

An error occurred (ValidationError) when calling the CreateStack operation: aws: prefixed tag key names are not allowed for external use.
Traceback (most recent call last):
File "/var/task/lambda_function.py", line 133, in cfn_handler
physical_resource_id, response_data = create_func(event, context)
File "/var/task/lambda_function.py", line 335, in create
}] + parent_properties['Tags']
File "/var/runtime/botocore/client.py", line 386, in _api_call
return self._make_api_call(operation_name, kwargs)
File "/var/runtime/botocore/client.py", line 705, in _make_api_call
raise error_class(parsed_response, operation_name)
botocore.exceptions.ClientError: An error occurred (ValidationError) when calling the CreateStack operation: aws: prefixed tag key names are not allowed for external use.