A user unmanaged an asset because the customer had turned off the asset off and the NOC did not want to get repeated messages from the asset so it was unmanaged. Two parallel assets were unmanaged. Once the customer turn on the asset the NOC re-managed the asset. Once asset came back and gave a green status the other asset still shows unmanaged. A rediscovery and re-poll of the asset show all seems to be up and running. Why does the status not change back to green on the asset?