Diagnosis
You have tried to create a rebate agreement. Division is a mandatoryfield for rebate agreements (as part of the distribution chain).
You have not entered a division. The system tried to determine the ERPdummy division. However, the ERP dummy division has not beenmaintained.

Procedure
In the sales data, specify a valid division that is not blank.
Or maintain an ERP dummy division in the organizational management'smaster data Customizing.