Advanced Pricing Rebates

Hi everyone,

I have a rebate type adjustment set up using item group and order group. On work whith Adjusments, I have combinations for same item group and order type, but with different units of measure.

Example:

Customer	Item Group	Order Group	UoM
1000	DUL	SO	BT
1000	DUL	SO	CA
1000	DUL	SO	PK
1000	DUL	SB	BT
1000	DUL	SB	CA
1000	DUL	SB	PK

I neet to set up bonifications according to the different UoM, but I get this error message: Record Invalid  

CAUSE: The record being processed either already exists for an 'ADD'

function or does not exist for an 'INQUIRY', 'CHANGE' or 'DELETE' function.