Is it possible to change the splitted batch position in Outb. Del. after transferred to EWM?

[tiw5thhu]

Hi all,
we are using the embedded EWM in our company.
We created an OUTB DLV based on the sales order with the transaction VL01N. In the OUTB DLV we created the batch splitting for one outbound delivery position. By saving the OUTB Deliv. ist transferred to EWM. In EWM the PRDO has NOT been processed. After that we want to change another batch in the splitted batch item because the entered batch was not the right batch. (User´s mistake) But SAP does not allow to change that. (The whole delivery positions are deactivated)
But when there is no batch splitting for the delivery position we can change the batch as we customized that the delivery can be changed after transferring to EWM when it has not been processed in EWM.
(Customizing path: Logistics Execution - Extended Warehouse Management Intergration - Basic Setup of connectivity - Configure SAP EWM-Specific Parameters - Deliv. Chg = X)

Our question: is there any customizing missing by ourself or SAP does not allow to change the split batch item any more even the position in PRDO is not processed?
Thank you for your answer in advance.
Best regards.
Thao