When Accelerated Database Recovery is enabled and disabled on a database where mirroring was configured earlier in SQL Server 2019, you will notice that Database mirroring cannot be reconfigured on that database.
Msg 1484, Level 16, State 1, Line LineNumber
Database Mirroring cannot be set for database 'ADR_Mirroring ' because the database has Accelerated Database Recovery enabled or there are still versions in the Persisted Version Store. If Accelerated Database Recovery is disabled, please run sys.sp_persistent_version_cleanup '<DatabaseName>' to clean up previous versions..
Note ADR is not supported for databases enrolled in database mirroring.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
This issue is fixed in the following cumulative update for SQL Server:
About cumulative updates for SQL Server:
Each new cumulative update for SQL Server contains all the hotfixes and all the security fixes that were included with the previous cumulative update. Check out the latest cumulative updates for SQL Server:
To work around the issue, you can change the database status to offline and online. Then, you will be able to reconfigure mirroring on the database successfully.