N-box - HDL load for historical data load (2021,2020,2019)

Summary:

Hello all, I am trying to load historical N-box ratings using Profile Item (TalentProfile.dat) I have created different meetings for each year and trying to load.

Problem I am facing is I am able to load only one row for an employee. Multiple year N-Box keep updating same row and shows only one row. meaning when I load 2021, it loads successufully, then I load 2020 for same employee with the different meeting ( SOURCE_KEY1 and SOURCE_KEY2) but it updates same rows. I see Date_From is not a key.

If I load multiple years in the same file, I am getting error, that I am supplying multiple rows.