Seaquel
SQL Server error code

SQL Server error 6609

SQL Server raises error 6609 at severity 16, which marks a problem with the query or data that you can correct.

Invalid data type for the column "%ls". Allowed data types are CHAR/VARCHAR, NCHAR/NVARCHAR, TEXT/NTEXT, and XML.
Msg6609
Severity16
Group6000–6999

Source: Database Engine events and errors