Calling mv() of s3fs.S3FileSystem with path1==path2 results in deletion. This is not the expected behavior, as a POSIX mv results in a message saying they are the same file, and in particular does not result in deletion.

Working example:

session = aiobotocore.session.AioSession(profile="dev")
s3 = s3fs.S3FileSystem(session=session)
path_to_file = 'mybucket/file.txt'
s3.mv(
        path1=path_to_file
        path2=path_to_file
)

Now, the file in my bucket at location path_to_file is deleted.
I have versioning enabled on my bucket for what its worth, so I see the delete marker.