Hi @Anonymous ,
- Applying CU12 to SQL 2019, then check the SQL server error log. It shows the information about databases upgrade. Database Node4 is offline in my environment.
>Could not open database [node4]. Replication settings and system objects could not be upgraded. If the database is used for replication, run sp_vupgrade_replication in the [master] database when the database is available.
2..Bring the database node4 online, then check the error log. I did not find any information about database node4 upgrade.
3.... Restart the SQL server instance, then check the error log. I still did not find any information about database node4 upgrade.
If the response is helpful, please click "Accept Answer" and upvote it, as this could help other community members looking for similar thread.