Diagnosis
The repetition item displayed has not been released. Changes to thereference item of the repetition therefore apply to all repetition itemsassigned.

Procedure
Use transaction EA62 for budget billing plans.
Use transaction FPR2 for installment plans.
On the list screen for the repetitions, you can make changes that arevalid for only one repetition. This only applies for changing the duedates and settiing locks (except for payment locks). If you want tochange additional data (deferral date, payment lock, payment method, andso on), first release the repetition item. To do this use thetransaction FPE2M (mass change to documents) and make the requiredchanges there. When you save, changed repetitions are releasedautomatically.