It is possible that others already owns that existing file that you shared, others rename and replicate [of what you posted] in order to exactly match the files ... This is known as Super-seeding ... https://en.wikipedia.org/wiki/Super-seeding https://wiki.vuze.com/w/Super_Seeding

Also, once the torrent has a certain number of seeders, it also won't work either.

I too am now getting this message, and suspect it has to do with the passkey issue raised on the other thread I made.