sales order VA02 & delivery issue VL01N

Hi team!!

your assistance will be highly appreciated

I have a sales order with 2 materials and when I want to do the delivery I can only do for item 110. (material type: ZPRD)

even this item is related to item 100 ( material type: Kmat) , i need to deliver this too, but is not possible since i get the following logs:

*No schedule lines due for delivery up to the selected date

• order item 0000 -00100 , with incomplete delivery group 001

I made some changes and got:

• Delivery group 001: Item 000100 contains no confirmed schedule lines - Message no. V1298

Could you please help me identify what is happening?

Thanks in advance.