Postman API won't skip empty rows of CSV

I'm trying to run a collection of API tests in postman and use the IDs from a CSV file as a variable in the URL to check each possible end point. My problem is there are more of sids than interaction ids, so when it runs out of interaction id's it just keeps running the test but leaving it blank meaning the tests all fail. Just wondered if there is a way to tell postman to stop running the interaction part of the runner or something I can put in the CSV file to skip the empty rows. My current work around is to have the data in separate CSV files and run the tests separately.

Sample of Data