Diagnosis
In a recipe, there may only be one valid change status on each date ata time. The valid-from date of a new change status must therefore bedifferent to that of existing change statuses.
There is, however, a change status for the recipe you selected whosevalid-from date is identical to the key date youentered or the date of the change number youentered. The system does not create the new change status.

Procedure
RESET N1
Check the valid-from date of the existing change statuses.
Use a key date or change number with a date that is not yet used in therecipe for your new change status.