I have created a flow that downloads data from List SharePoint, performs calculations based on this data and saves the information in Excel. This is a loop for 74 records. I need this calculated data to be written back to the sharepoint list, but some fields for some records will be empty. How to use update item to know for which record ID the data should be changed, and if there are none, leave the field empty?
In the flow I created, unfortunately it puts the same values ​​in all fields.

