I tried to submit my song via soundcloud but an error about “sharing changes” prevented me from uploading it. What does that mean?

The song you tried to submit is most likely already on SoundCloud, and SoundCloud does not let you post the same song more than once. You can either upload a song that is not already on SoundCloud or email your song to submit at getheard dot org. PLEASE MAKE SURE THE SONG NAME ON YOUR GETHEARD SUBMISSION FORM IS THE SAME AS THE SONG YOU UPLOADED ONTO SOUNDCLOUD!