Seaquel
SQL Server error code

SQL Server error 9466

SQL Server raises error 9466 at severity 16, which marks a problem with the query or data that you can correct.

XML parsing: line %d, character %d, XML namespace xml namespace URI (http://www.w3.org/XML/1998/namespace) must be assigned only to prefix 'xml'.
Msg9466
Severity16
Group9000–9999

Source: Database Engine events and errors