Seaquel
SQL Server error code

SQL Server error 1403

SQL Server raises error 1403 at severity 16, which marks a problem with the query or data that you can correct.

The witness for the mirroring session received error response %d (state %d) from server instance %.*ls for database %.*ls. For more information about the error, refer to the error log on this server instance and the partner server instance.
Msg1403
Severity16
Group1000–1999

Source: Database Engine events and errors