Castle.ActiveRecord.Framework.ActiveRecordException: Could not perform Delete for XXX —> NHibernate.Exceptions.GenericADOException: could not delete collection
The beginning of the stack trace I got today looked as below:
2009-05-19 11:01:45,078 ERROR [5232] XXX - Speaker already deleted: Castle.ActiveRecord.Framework.ActiveRecordException: Could not perform Delete for Speaker ---> NHibernate.Exceptions.GenericADOException: could not delete collection: [XXX#XXX][SQL: SQL not available] ---> System.Data.SqlClient.SqlException: Cannot insert the value NULL into column 'SpeakerId', table 'XXX.dbo.lnk_Session_Speaker'; column does not allow nulls. UPDATE fails. The statement has…
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