Diagnosis
You tried to post a goods issue to a cross-system delivery. However, agoods receipt has already been posted to this delivery and a UPS packageV1 also exists for this goods receipt for distribution to a receiversystem.

System Response
Since a second UPS package cannot be generated for a delivery, the goodscannot be issued.

Procedure
Reduce the delivery to the quantity previously posted as goods issue.
If the first goods issue is reversed in full, the delivery can also bedeleted in full.
Then create a new delivery for the remaining, open order quantities.