I have two lisences one is pd 16, one is for pd17 upgrade. When I recovery my Mac and reinstall pd 17, it need to fill in two lisences keys, but the original pd16 key cannot be activated and show: 旧激活密钥尚未被许可证服务器接受. However, when I just use pd 16 app, this pd 16 liscense can be activated.