Using QP_Price_List_Util.process_price_list to add new price break lines

Hello,

I have created a concurrent program that creates and updates price lists using the Process_price_list API.

I can create Price List Lines, and update them.

I can create Price Break lines, and update them.

The only part I can not get to work is the situation below:

     An existing Price Break Header and Line exists for Item 123, the Price Break is Qty 1 to 10 is $10.

     I want to add an additional Price Break Line to this for Qty 11 to 20 is $9.

I can make this work if the Price Break Header does not already exist, so I can create the new line with the two price breaks no problem.