SAP PP MRP Lose of link between sales order and production order

Issue with production order confirmation

Due to lose of link between sales order and production order due to credit check problem The production order for higher level component lost link and was hanging out in limbo status.

Now the production order at lower level component also loose track and they were already released where as production orders at higher level were not released

So now lower level production orders were tecoed with BDC program as there were 1200 production orders to be tecoed at lower level .

So once I deleted lower level, I saw that there were planned orders for same component and same sales order and item, this was because MRP was running at same time .

So this MRP generated planned orders as the production orders at highrt level were still hanging there and to full fill those production orders lower level component planned orders were generated

So now cleared the production orders in top level and ran MRP in display mode and found that there were no planned orders for lower level component.

But still there were two more planned order created at higher level has I previously tecoed them and did zero confirmation due to some other reason, So I had to unteco them to delete these planned orders and also cancel confirmation to get the production order element on to MD04 screen. Once Iam done with that it show a message 26

So It should be clear that if the exception message is 20 ie cancel process then that production order must be deleted as there is no requirement to consume this order. As all this context was made in MTO stock product.