Seaquel
SQL Server error code

SQL Server error 6902

SQL Server raises error 6902 at severity 16, which marks a problem with the query or data that you can correct.

XML Validation: Invalid definition for type '%ls'. SQL Server does not currently support the use of the pattern or enumeration facet on lists of type QName.
Msg6902
Severity16
Group6000–6999

Source: Database Engine events and errors