Seaquel
SQL Server error code

SQL Server error 6909

SQL Server raises error 6909 at severity 16, which marks a problem with the query or data that you can correct.

XML Validation: Text node is not allowed at this location, the type was defined with element only content or with simple content. %S_MSG %s
Msg6909
Severity16
Group6000–6999

Source: Database Engine events and errors