Seaquel
SQL Server error code

SQL Server error 6802

SQL Server raises error 6802 at severity 16, which marks a problem with the query or data that you can correct.

FOR XML EXPLICIT query contains the invalid column name '%.*ls'. Use the TAGNAME!TAGID!ATTRIBUTENAME[!..] format where TAGID is a positive integer.
Msg6802
Severity16
Group6000–6999

Source: Database Engine events and errors