Trying to move Parallels 11 install from one Mac to another

I have used the account settings to sign out on the old mac.
On new Mac I entered the license key and it shows a green check, I click 'activate' and get a window that says 'license is already in use' and I click 'Activate on this Mac.' Then it says I have reached the maximum amount of installs and need to buy it.

 

Hi, please use this KB as a probable solution and check the issue.