Line with 0 quantity for main item with batch split

Hello experts,

I have one line item in delivery. Delivery split is there: There are 1 spilt items with 1 batch nos. The main item category and the batch split item category are TAN.

My system is showing 2 line items in billing, the batch line with quantity and the main line with zero qty. How to prevent this and have only the lines item in invoice with batch/qty. I don´t want to see the main item with o quantity.

In VTFL I have routine for copying requirements 004 and Billing Quantity B. I need to create another copying routine or I need to use another item category for batch lines?

Thanks in advance

Pablo