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

Hi I am facing the same issue. My trial version has expired and I decided to purchase the full version but the message "you have entered an upgraded key. Please confirm it with the key from the previous version" keeps popping up. I have one 1 key. Help me
 
Hi I am facing the same issue. My trial version has expired and I decided to purchase the full version but the message "you have entered an upgraded key. Please confirm it with the key from the previous version" keeps popping up. I have one 1 key. Help me
Hello, please help us with your purchased reference number to assist you further.
 
It has been a while, we are still waiting. Instead of waiting indefinitely, can we get refund to purchase new license? Thanks.
 
是的 第一次购买
Hello, as a new user, you need to purchase the full version Parallels Desktop license key. Upgrade key only works, when you already have a previous version of Parallels Desktop. Kindly help us with your purchased reference number so that we can assist you with refund and you can purchase s full license.
 
Hello, as a new user, you need to purchase the full version Parallels Desktop license key. Upgrade key only works, when you already have a previous version of Parallels Desktop. Kindly help us with your purchased reference number so that we can assist you with refund and you can purchase s full license.
你好 怎么办理退款
 
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