Seaquel
SQL Server error code

SQL Server error 6398

SQL Server raises error 6398 at severity 16, which marks a problem with the query or data that you can correct.

The MAXLENGTH option value specified for the path '%.*ls' for Selective XML Index '%.*ls' is not allowed. The value should be in the range %d - %d.
Msg6398
Severity16
Group6000–6999

Source: Database Engine events and errors