Importing Error

I imported a list of subscribers, then realized I had imported too many. I moved all the newly imported subscribers to the trash, then emptied the trash.

I edited my import by removing INACTIVE & BOUNCED subscribers. I tried to import the list again, but I keep getting the error, “659 records had issues and were skipped”. Reading the details of the error shows, “659 emails appear more than once in your file”.

How do I reset my list so I can import the subscribers again?