Diagnosis
One of the following situations triggered this message:

• You are processing an item which is already marked as a co-product and
want to assign this item to an alternative item group.

• You are processing an item which is assigned to an alternative group
and want to mark this item as a co-product.
An item can be either defined as a co-product or assigned to analternative item group.

Procedure
Decide whether the item is a co-product or an alternative product.


• For a co-product, set the co-product indicator. Do not enter an
alternative item group.

• For an alternative item, enter an alternative item group. Do not enter
the co-product indicator.