File Layout inserting blank row into second and third level rowset record during import process

I have a 3 level page. I have exported the data using a row-based file layout (CSV). I have updated the level0 keys and trying to import the data back into tables.

I have dragged the file layout into PeopleCode action to generate the default logic. It is inserting data only into level0 record and it inserted a single blank row into level 1 and level 2 record.

Do I need to make any changes to the default logic to insert data into level 1 and level2 records? I really appreciate your help.

I have attached the screenshots of the page, file layout, export logic, and import logic