Flagging deletion Assembly process orders

Hi Gurus,

I'm trying to set deletion flags to Assembly process orders (created with Strategy group 82). The orders are already Closed with CLSD status but the system disables Deletion flag option in COR2 transaction code. We have little diversion here. Our Assembly orders don't have Sales orders as Settlement receiver, we changed it to Material.

Please suggest.

Regards,

Shoyeb