I have a form that is intended to track the progress of a task with users updating the form periodically X amount of times. As such, I used a repeated section on my nintex form that has it's data transferred onto another list to preserve that data stored there, as currently in the new form designer there is no option to disable the delete row option for a repeated section.

I have figured out how to preserve the data that has been newly entered and submitted by using a loop and query xml action however, the main problem with my solution is that it copies ALL the data into the sharepoint list again. Meaning I have duplicated data entered each time the user submits an update.
 

Eg. Update 1 ---> user submits ---> Update 1 is copied onto sharepoint list
Update 2 ---> User Submits ---> Update 1 and Update 2 is copied onto sharepoint list.

Is there a way to prevent this from happening and only update the list with newly updated data?