RHN yum command: Unable to read consumer identity Warning and Solution

I am using yum update command with RHN to upgrade packages installed on my server, but getting the following warning on screen :yum update -y Loaded plugins: product-id, protectbase, rhnplugin, security, subscription manager: Updating certificate-based repositories. Unable to read consumer identity 0 packages excluded due to repository protections Setting up Update Process Resolving Dependencies --> Running transaction check ...&ltsnip> How do I get rid of this warning /error under RHEL 6 server?

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