Thanks for a quick fix. If you intend for your batch torrent to be the "definitive" collection, it's better to nuke the flawed torrent and replace it with a fixed batch. Fragmenting it into "patches" risks the fragments not retaining seeds in the future. If you keep archive names the same (so without the v2 part), then people don't have to download the entire thing, since any competent torrent client would just recheck the torrent and download only mismatched files/segments.