how to create production order for scrap qty from original production order?

You question is a bit unclear:

Are you wanting to Disassembly a production item manufactured on a previous Production order?

-You would need to create a Production Order of type Disassembly and use Disassembly transactions

Are you wanting to scrap a Production item during the Production Process?

-You would need to enter the quantity you want to scrap as part of the labor or move transaction.  You may need to add “qty is scrap” and “scrap action” form the grid column picker to your Labor/Move screen as they are not visible by default.

No i don’t want to disassemble that production item ,i just want to create new production order for the scrap qty which was noted at old production order and order should be automatically be created