Diagnosis
You have changed the "Date of 1st debit position", rental start, orrental end with the result that some conditions are now outside therental period and should be deleted or other dependent data (noticeperiod, index data) is affected. You have selected "No" on thesubsequent confirmation prompt displayed by the system or the datawindow containing the data to be changed.

System Response
The system assumes that you do not want to change the field and hasentered the previous valid date in the field again.

Procedure
If you want to change the field, you must confirm the confirmationprompt by choosing "Yes" or adjust the dependent data and confirm with"Enter".