Seaquel
SQL Server error code

SQL Server error 6827

SQL Server raises error 6827 at severity 16, which marks a problem with the query or data that you can correct.

FOR XML EXPLICIT queries allow only one XMLTEXT column per tag. Column '%.*ls' declares another XMLTEXT column that is not permitted.
Msg6827
Severity16
Group6000–6999

Source: Database Engine events and errors