To summarize steps to find and remove duplicates in an app
Go to the app that has duplicate items *note: only admin level access can delete
Sorting by the column will help group the duplicates together for easier detection and removal, example name, phone number, address etc. for this article Direct Number column is used. Click the column heading to sort A-Z or 0-9 click it again to reverse sort Z-A or 9-0.
Find and mark duplicates
Click the trash can icon to delete