Account modifier for new Movement type by copying 601 - KON Transaction key

Hello ,

I am creating a new movement type copying 601 . While copying I am not seeing KON transaction key in account grouping tab . Basically I want to assign a new account modifier for KON so that I can hit a specific GL account for consignment settlement . However not able to assign account modifier and its grayed out if go to the detail view from account grouping .

Let me know if its possible to assign new account modified against KON in my new movement type . Thanks in advance for your kind inputs