When running oc mirror, the process generates files under working-dir/cluster-resources once mirroring is complete. 
One of these files is the UpdateService definition, but it does not specify a namespace. 
Based on my understanding of the default OpenShift Update Service (OUS) Operator configuration, this resource should reside in the openshift-update-service namespace.

Could we include metadata.namespace: openshift-update-service by default in the generated file?

Otherwise, users might be confused, as running oc create -f working-dir/cluster-resources/updateService.yaml will create the resource in their current project instead of the required openshift-update-service namespace.

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