ALV Editable issue with Duplicate & Delete Rows

Hi All ,

I am working on an BOM alv report with editable fields.

In my requirement I have to delete a row and later insert a row.

When I do a delete it works fine and updates the internal.

next time when I duplicate a row , the internal table has one record less .

ex.

I have 10 rows.

I delete 1 row. ITAB is updated with 9 rows .

Now when I do a copy (duplicate a row) it should be 10 but the ITAB is having only 8 the row which I used to duplicate is also deleted .

I am not sure where I am going wrong. Will be great if anyone can guide me in the right direction .

I am using on_data_changed event and write .

Thank You.

Regards,

S.K.