Inbound automatically delivery created with zero quantity

Hi Folks,

We have EWM integration.

The scenario is like this:

• Our user had created a PO
• For some reason, the requirement for one of the PO line items is not there any more
• So, she tried to delete the PO line item
• However, she got an error message saying that "There is an open inbound delivery 180####### in the WMS for PO 45000#######, item *** "
• This IB delivery was not visible in either PO History tab or confirmations tab of the PO
• The qty. for the material was zero in that IB Delivery.
• Since qty. is already zero for this delivery, cancellation in EWM is not working out

There are two questions:

• Is there a workaround to delete the PO line item ?
• Why was this IB delivery created? Is there a way to avoid this situation in future ?

Thanks

Akash