Seaquel
SQL Server error code

SQL Server error 1409

SQL Server raises error 1409 at severity 16, which marks a problem with the query or data that you can correct.

Database "%.*ls" requires database logs to be restored either on the future mirror database before you can enable database mirroring or on a secondary availability database before you can join it to the availability group. Restore current log backups from the principal database or primary database.
Msg1409
Severity16
Group1000–1999

Source: Database Engine events and errors