Notification badge on Messages says 1 unread message, but there isn't any
On one of my Macs (macOS 13.0), the Messages app shows a notification of "1".
However, I see no unread messages. Furthermore, the other devices (another Mac and an iPhone) which share the same iCloud account show zero unread messages.
I have tried:
- Restarting the computer
- Turning off Messages in iCloud and turning it back on
- Logging out of iCloud and logging back in
MacBook Air (M2)