Set you log_level to level 2 (err) or higher to see the relevant error messages.
Check the kopano-server log for the following error:
- Create a backup (either using kopano-backup or creating a backup of the database only).
Stop the kopano-server
- NB: The kopano-dbadm cleanup can take a while depending on your database size and hardware configuration.
Run the kopano-dbadm tool
Restart the kopano-server
A quick temporary fix.
To get kopano-server running again without fixing the underlying issue, you can use the ignore-database-version-conflict flag:
Add any flags you would normally also use.
This is a temporary workaround and it does not fix the underlying issue.
When running with this flag the kopano-server will use the old database schema.
Data loss or corruption can therefore still occur.
K-1216: Cannot update to schema v69, because the "names" table contains unexpected rows. Certain prior versions of the server erroneously allowed these duplicates to be added (KC-1108)."