Seaquel
SQL Server error code

SQL Server error 6919

SQL Server raises error 6919 at severity 16, which marks a problem with the query or data that you can correct.

XML Validation: The type of element '%s' is abstract. Instantiation requires the use of xsi:type to specify a non-abstract type. %S_MSG %s
Msg6919
Severity16
Group6000–6999

Source: Database Engine events and errors