On &1 you can only change the table line with change number &2
Message type: E = Error
Message class: CX - Nachrichten für Konfigurationsprozess
Message number: 256
Message text: On &1 you can only change the table line with change number &2
What causes this issue?
You want to change a table entry with a change number.
System Response
The system checks whether changes with this number are allowed. Values
have already been changed or added on this date (&V1) with change
number &V2&. This means that you can only make changes on this date if
you use change number &V2&.
How to fix this error?
Call the function again using change number &V2&.
Error message extract from SAP system. Copyright SAP SE.