Unable to re-export playlists

Before the latest update, I could just export the playlists to my USB via sync manager and it would replace the playlists, now when I do it, it is saying there isn’t enough room on my usb (there is), it seems to be trying to add the playlists again, rather than replacing the playlists that are already on (like it used to).

All I am trying to do us update the playlists on my USB with some new tracks I’ve added…hoping there is just a simple solution that I’m missing!