Seaquel
SQL Server error code

SQL Server error 1464

SQL Server raises error 1464 at severity 16, which marks a problem with the query or data that you can correct.

Database "%.*ls" is not in a recovering state which is required for a mirror database or secondary database. The remote database must be restored using WITH NORECOVERY.
Msg1464
Severity16
Group1000–1999

Source: Database Engine events and errors