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Unable to activate license - Team Viewer 13 upgrade from 12


     I am not able to activate my Team Viewer 13 License through team viewer management console (Legacy License Key Activation) when I tried to activate license it says 

"The license you tried to activate is already activated on another TeamViewer account."

Now TeamViewer not allowing me to access any remote computer.

License Purchase on 02 Dec 2017 (Invoice Number XXXXXXXXX [information removed by moderator])