Diagnosis
It is not possible to remove the account assignment indicator becausethere are account assignment indicators set in the following months.This means that documents were already posted in following months thatare based on composite rates or the base rate that were calculated onthe basis of the option rate of the month that you want to change.
Therefore, you first have to remove the account assignment indicator inthe following months.
Note:
If you already removed the account assignment indicator for thefollowing months in the current dialog, then you need to save thesechanges.