Total quantity cannot be distributed (invoice position &1)

What causes this issue?

You have entered a total quantity for invoice item &V1& that the system
cannot distribute to the account assignment items. All the account
assignment items you have selected in the current invoice item have a
<DS:DE.AA_FINAL_IND>final account assignment indicator</> and a
<DS:DE.AA_FINAL_QTY>final account assignment quantity</> in the purchase
order. The current total quantity exceeds the sum of the
<DS:DE.AA_OPEN_QTY>open quantities</> of the account assignment items
with a final account assignment.

System Response

This is an error message. The system cannot distribute a total quantity
of the magnitude you entered across the account assignment items with a
final account assignment.

How to fix this error?

Reduce the total quantity of the invoice item, or remove the final
account assignment indicator from individual account assignment items in
the purchase order.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.