Seaquel
SQL Server error code

SQL Server error 423

SQL Server raises error 423 at severity 16, which marks a problem with the query or data that you can correct.

Xml data type methods are not supported in check constraints. Create a scalar user-defined function to wrap the method invocation. The error occurred at table "%.*ls".
Msg423
Severity16
Group0–999

Source: Database Engine events and errors