I had 11.6 Big Sur on an apfs volume, installed 12.0.1 Monterey on a different volume, deleted the first volume
Now Time Machine Backup fails:
Time Machine could’t complete the backup to “…”
An error occurred while preparing the backup.
log show --predicate 'subsystem == "com.apple.TimeMachine"' 2021-11-12 15:51:19.822567-0800 0x1ed985 Error 0x0 230 0 backupd: (TimeMachine) [com.apple.TimeMachine:General] Backup failed (301: BACKUP_FAILED_PREFLIGHT_STAGE_DATABASE_GENERATION) 2021-11-12 16:34:53.380762-0800 0x1f0581 Error 0x0 230 0 backupd: (TimeMachine) [com.apple.TimeMachine:EventCollection] No event store UUID for volume '/Volumes/Recovery HD'
Key log output: No event store UUID for volume '/Volumes/Recovery HD'.
It seems Recovery HD has some storage uuid that is no longer available
What’s the action?