SAP Message BEA261 - Change for interco. billing: Due list item &1 for trans. &2 incomplete

Diagnosis
For repeat transfer of item &V1& in transaction &V2& to the billing duelist, the system determined that the conditions for intercompanybilling (IC) have changed.
In the last transfer, the vendor was assigned to a different companyfrom the company it is now assigned to.

System Response
The billing due list for item &V1& in transaction &V2& is incomplete andmust be reprocessed.

Procedure
Check the assigned vendor in preceding document item &V1& of transaction
V2:
Change preceding document item &V1& of transaction &V2&, if an incorrectvendor is currently assigned.
If the current vendor is correct, cancel the incomplete billing duelist.