you have entered an upgrade key. Please confirm it with a key from the previous version

Hi, I got a key while buying mac and was using parallels using it till now. Today I bought the upgrade key using the upgrade to 15 on my machine. I see that during activation I am being asked for old key, when entered which is being not accepted. I am stuck, Can you pls help
 
Hi, I got a key while buying mac and was using parallels using it till now. Today I bought the upgrade key using the upgrade to 15 on my machine. I see that during activation I am being asked for old key, when entered which is being not accepted. I am stuck, Can you pls help
Hello, could you please share your keys with us via the PM?
 
Same problem. I purchased an upgrade license, but it is giving me "The previous activation key has not been accepted by the license server."
 
Hi I have just bought a parallel desktop 16 for Mac but when I enter the product key, it says "You have entered an upgrade key. please confirm it with a key from the previous version".
please find a solution or refund me
 
Hi I have just bought a parallel desktop 16 for Mac but when I enter the product key, it says "You have entered an upgrade key. please confirm it with a key from the previous version".
please find a solution or refund me so that I can buy a full license
thank you
 
Hi I have just bought a parallel desktop 16 for Mac but when I enter the product key, it says "You have entered an upgrade key. please confirm it with a key from the previous version".
please find a solution or refund me so that I can buy a full license
thank you
Hi, do you have any previous Parallels Desktop key?
If no, please provide us with your purchase order number to initiate a refund.
 
Hi, do you have any previous Parallels Desktop key?
If no, please provide us with your purchase order number to initiate a refund.

Hi thank you for your reply,
I do not have any previous parallel desktop key, here my purchase order number for the refund: 234850942.
thank you
 
Hi thank you for your reply,
I do not have any previous parallel desktop key, here my purchase order number for the refund: 234850942.
thank you
Hi, your order has been refunded. You will receive funds during the next 5-7 days.
Please let us know if you have any additional questions.
 
Getting the same error displayed on my screen. Trying to upgrade from a free version to a student (pro) version on my Mac. My free version expires today and I thought a license yesterday. Can someone help me?
 
JUST upgrade today i am having the same issues paid all the money for the upgrade but have no working software as i don't have the old key? despite request for help? same problem but when i will put the key i have received the message "you have entered an upgraded key. Please confirm it with the key from the previous version" requeste my previous key 10 to 16 despite the help desk telling me i have a registered version on record?
 
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