When you have created a blanket sales order in the program, it will remain in the program. These orders are not deleted automatically.
You can delete the blanket orders with the Delete Invd Blnkt Sales Orders batch job.
Open the Delete Invd Blnkt Sales Orders batch job request window.
To select the orders to be deleted, you can set filters in the No. (order number), Sell-to Customer No. and Bill-to Customer No. fields.
Deleting Invoiced Sales Orders
Viewing Additional Information about Posted Sales Documents