Material assigned to several deliveries (e.g. & & and & &); no rapid CF

What causes this issue?

The shipment is specified to have either automatic or no balance load.
This can be customized per shipment type and can be overwritten manually
in the shipment header.
The shipment is specified to have more than one delivery item per
compartment (non full drop).
On the bulk shipment, there are several deliveries which are assigned to
be delivered from one material on board.

System Response

The system does not allow rapid delivery confirmation from the entry
screen.

How to fix this error?

Unflag rapid confirmation and use <ZK>normal</> delivery confirmation
functionality.

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.