SAP Message VPKGUI103 - The total of the quantities entered exceeds the open quantity

Diagnosis
The total achieved by adding the quantity to be billed to the quantityreset exceeds the open quantity.

System Response
The system determines the rejected amount by comparing the openquantity, quantity to be billed, and quantity reset. In the currentinstance, the resulting quantity is negative.
INCLUDE NA_ALLG_VERARBEITUNG OBJECT DOKU ID TX