Seaquel
SQL Server error code

SQL Server error 9241

SQL Server raises error 9241 at severity 16, which marks a problem with the query or data that you can correct.

Service broker dialog '%.*ls' could not be closed because the database with id '%d' is not available. Consider closing the dialogs manually once the database is available again.
Msg9241
Severity16
Group9000–9999

Source: Database Engine events and errors