Seaquel
SQL Server error code

SQL Server error 9998

SQL Server raises error 9998 at severity 16, which marks a problem with the query or data that you can correct.

The column '%.*ls' cannot be added to a full-text index. Full-text indexes are limited to 1024 columns. When you create a full-text index, add fewer columns.
Msg9998
Severity16
Group9000–9999

Source: Database Engine events and errors