How to Resolve "Already Processed Files"
Edited
If you are seeing this error, it means there is a file on your SFTP server that wasn't archived, and you are trying to process the exact same file twice. Here is a screenshot of the error:
You can delete the file from your SFTP server. The Modern Dropship system backs up every file it receives, so it can be used for user audit and retries. You can retrieve this file at any point in the future.