Ashish,
Sorry I wasn't clear enough, the other key is a NET key and its purpose is to be used over the network, and it's working accordingly.
Even if a master key cannot be used remotely, the master key and NET key are seen as a shared keys in any other client with the license manager installed.
The master key shows NET access in all features except "Product Activation Module".
Do I need to disable NET in all other features for it not to be seen on the network? How is this done? Is it reversible?