Thank you for your message.
If could be the result of one of our server crashes.
For the machines marked as "offline", there is no way to refresh them. You will have to delete them and add them manually with the new ID.
For those marked as "offline (unknown)", you just need to restart the TeamViewer service, and the ID will update automatically.
I hope this could help. If not, do not hesitate to contact us again.
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