Seaquel
SQL Server error code

SQL Server error 9531

SQL Server raises error 9531 at severity 16, which marks a problem with the query or data that you can correct.

In the XML content that is supplied for the column set column '%.*ls', the '%.*ls' attribute value on the element '%.*ls' is not valid.
Msg9531
Severity16
Group9000–9999

Source: Database Engine events and errors