Seaquel
SQL Server error code

SQL Server error 1408

SQL Server raises error 1408 at severity 16, which marks a problem with the query or data that you can correct.

The remote copy of database "%.*ls" is not recovered far enough to enable database mirroring or to join it to the availability group. You need to apply missing log records to the remote database by restoring the current log backups from the principal/primary database.
Msg1408
Severity16
Group1000–1999

Source: Database Engine events and errors