Seaquel
SQL Server error code

SQL Server error 6379

SQL Server raises error 6379 at severity 16, which marks a problem with the query or data that you can correct.

selective XML index '%.*ls' already exists on column '%.*ls' in table '%.*ls'. Multiple selective XML indexes per column are not allowed.
Msg6379
Severity16
Group6000–6999

Source: Database Engine events and errors