Seaquel
SQL Server error code

SQL Server error 9526

SQL Server raises error 9526 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 sparse column set '%.*ls', the '%.*ls' attribute value on the element '%.*ls' is out of range. The valid range is from 1 to %d.
Msg9526
Severity16
Group9000–9999

Source: Database Engine events and errors