Hi Umang,
in this caso if a production order cover all quantity of MTO order you aren't able to choose the production order quantity separatly for cover the other 4 items, if the production order has deleted flag.
You have two piossibility :
1. Create a production order for each item of sales order so that you can handle single production order duly.
2. Go to OPJJ in ATP rules eliminate production orders as coverage element so that you confirm only on stock logic.
I hope have been useful for you.
Daniele