在Parallels Desktop for Mac 17正确输入升级后的激活码后，正确输入旧激活码，显示旧激活密钥尚未被许可证服务器接受。 After correctly inputting the upgraded activation code in Parallels Desktop for Mac 17, correctly input the old activation code, and the message appears that the old activation key has not been accepted by the license server.
