Hello
I have checked the above configurations, could not find anything related to the above points.
The main thing is that both the sales order have the same scheduling line category as well as same item category
There is no delivery block or credit check.
Order type is also same for both the orders.
Is it something happening due to the custom code that for one sales order it deletes the requirement list in MD04 when a schedule line date is changed whereas for the other this issue doesn't happen.
your help is much appreciated.