I can see the TeamViewer ID of my device in the free-device list, but I cant log in this device.

My free TeamViewer account got logged off for some reason, and when I try to log in on my device with my account, I got the 'Account login error: TeamViewer is free for personal use on a limited number of devices. You have reached the limit of devices.' However, I can find this device on the free-device list of my account.