Thanks Kevin, you've right. It's great that you see a problem just from few rows.

by the way I'm making update statement:

use TBCDEV

GO

Begin Transaction

update GFO.GFO_TRANSACTION set DESCRIPTION=null, TRANSACTIONNUMBER=null, REGISTRATIONDATE='20120713 12:53:08.644', DISCRIMINATOR='cz.bsc.g6.components.loan.domain.CreditLimitChangeTransaction', REMARK=null, ENVELOPE=null, STATUS='CS', BUSINESSOBJECTTYPE='3.09.11.01', REGISTEREDBY=2635, SIGNEDCONTENT=null, EXTERNALSYSTEMRESULTCODE=' DCM_30021', EXTERNALSYSTEMRESULTDESC='The request was not found.', CHANNEL='IBS'...