You cannot select assembly order for deletion

Hello,

We are following MTO scenario for our manufacturing cycle, SAP Project trigger gets generated as soon as we save Sales Order in SAP, Plant selected in Sales Order is UN05.

Than Production process starts, production people execute MRP on WBS Element in SAP. And Manufacture the product and record result in SAP production order. Now, when time comes for Dispatch the stock available in SAP as well as in physical is at Other Plant then UN05.

Commercial People earlier used to change plant from UN05 to respective plant in Sales Order. But Now they are getting error message "You cannot select assembly order for deletion, Message no. V1748"

You are kindly requested to suggest solution as we are facing this problem with almost 80% dispatch cases.

Thanks in advance for support

Vishal Kadia