Data Being Added Conflicts with Existing

Hi,

I have two pages. on first page I am having a scroll.where i fill the data.

on second page I have grid with the different record. on Page Activate of second Page.

I am taking all the rows from the scroll on first page and copying them to the Grid in second Page with some modification/corrections using copy to function.

This works fine but when I delete a row from Scroll Area and try to save a component i come across below Error:

Data Being Added Conflicts with Existing.

When i put a trace and checked after saveprechage ,Peoplesoft Delivered code is trying to update the key field of the row.