Seaquel
SQL Server error code

SQL Server error 1447

SQL Server raises error 1447 at severity 16, which marks a problem with the query or data that you can correct.

ALTER DATABASE "%.*ls" command cannot be executed until both partner server instances are up, running, and connected. Start the partner and reissue the command.
Msg1447
Severity16
Group1000–1999

Source: Database Engine events and errors