When working with output orders I see some customer struggling with deleting open output orders.

They typically have open output like this:

When deleting it, they get the following error:

The reason for this, it that deleting a output order will also trigger a delete on the inventory order transaction (WMSOrderTrans).  And this delete will again try to delete the original output order(WMSOrder).

To avoid this error is to disable the OCC (Optimistic Concurrency Control) for the WMSOrder, like this :

The issue is reported to Microsoft and is expected to be available in AX 6.2 (AX 2012 R2) or the AX 7.0.