Diagnosis
Item &SYST-MSGV1& of transaction &V2&
is to be changed in the billing due list. The difference group of thenew item version does not match the difference group which waspreviously stored in the billing due list.

System Response
The billing due list item is marked as incomplete. Changing thedifference group of a billing due list item which has already beenbilled leads to incorrect settlement.

Procedure
Check the corresponding business transaction and correct the itemassignment there. If the assignment is correct, settlements that havealready taken place for this difference group must be cancelled beforethe incomplet item can be corrected using the transaction 'Analyzeincomplete billing due list entries'.