Net value of Sales order Zero - delete line item

Question

Hi,
Sales Order is raised for 3 materials.
Line item 10 --> 1 Qty --> Quantity delivered -->1
Line item 20 --> 1 Qty --> Quantity delivered -->1
Line item 30 --> 1 Qty --> Quantity delivered -->0
Line item 10 and 20 have some price but as a result of R100(100% discount) their net value is zero.
Line item 30 has some price, lets say Rs. 100
The requirement: Line item 30 needs to be deleted.
When I delete line item 30  and attempt to save the order, it takes me to incompletion log.
Where it displays line item 10 Missing Data Net Value
Where it displays line item 20 Missing Data Net Value
What are the possible solutions?
Happy Diwali in advance.
thanks,

Answer 1

I think I need divine intervention on this.
1.I applied OSS NOTE 106567 and ran the report SDVBUV00 but it didnot solve my problem. Raised this issue in OSS also, but no solution.
2.I changed the incompletion log for my sales doc at item level... I changed VBAP-NETWR as warning but still I could not solve it.
3. Assigning "reason for rejection" at item level, does not solve the purpose and it invokes the incompletion log
Any other options.
Just a quick recap on the nature of problem.
"+ Sales Order is raised for 3 materials.
Line item 10 --> 1 Qty --> Quantity delivered -->1
Line item 20 --> 1 Qty --> Quantity delivered -->1
Line item 30 --> 1 Qty --> Quantity delivered -->0
Line item 10 and 20 have some price but as a result of R100(100% discount) their net value is zero.
Line item 30 has some price, lets say Rs. 100
The requirement: Line item 30 needs to be deleted.
When I delete line item 30 and attempt to save the order, it takes me to incompletion log.
Where it displays line item 10 Missing Data Net Value
Where it displays line item 20 Missing Data Net Value" +