Activation failed after messing with NICs?

I had activated my installation and was trying to make it recognize 2 other nics. I dont know linux at all so I was googling. I managed to figure out how to set the eth0,1,2 using ifconfig, but in doing so my activation is not deactivated. what did ti do and can I restore activation without using up one of my 2 remaining resets?
Nono of the hardware/software changed at all. Trying to activate using the existing code returns that it is assigned to another system .

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