"Oops! Record Duplicate un-reverted deletion soundcloud:deletions:75168878 for Track/220467718 found!"Current bug in backlog of deletion jobs. Sep 4 2015.
Best answer by Mathis
UPDATE: We've been experiencing technical difficulties with our deletions server most recently. A fix for the "Oops! Record Duplicate un-reverted deletion soundcloud:deletions:..." error has been deployed since then, so you should all be able to delete these tracks off your profiles now properly.
If not so, please do let us know here.
Apologies about the inconvenience and a massive thank you for your patience.