You can manage/modify the stats of an affiliate in adjust statistics.
Select any offer and affiliate from the drop down of whom you want to change the data. The ‘Adjust Method’ option allows you to add/remove clicks and conversions if any discrepancy arises in the data. You can make the changes by setting the quantity of any operation that you want to perform in adjust method.
Once reviewed, you can confirm the changes and the updated records will appear in the reports.