403 forbidden error after failed partial upload

I've tried to reupload my package due to a bad connection. The upload was aborded after the dsc.

Now I get:

$ dput mentors deejayd_0.14.0~hg+1+9ef373dd259e-1_amd64.changes
Checking signature on .changes
gpg: Signature faite le mer. 16 sept. 2015 08:31:12 CEST avec la clef RSA d'identifiant 32EC3DB5
gpg: Bonne signature de « Alexandre Rossi (Main ID) <alexandre.rossi@gmail.com> »
Good signature on /home/niol/oss/scratch/debian/deejayd/deejayd_0.14.0~hg+1+9ef373dd259e-1_amd64.changes.
Checking signature on .dsc
gpg: Signature faite le mer. 16 sept. 2015 08:31:12 CEST avec la clef RSA d'identifiant 32EC3DB5
gpg: Bonne signature de « Alexandre Rossi (Main ID) <alexandre.rossi@gmail.com> »
Good signature on /home/niol/oss/scratch/debian/deejayd/deejayd_0.14.0~hg+1+9ef373dd259e-1.dsc.
Uploading to mentors (via http to mentors.debian.net):
Uploading deejayd_0.14.0~hg+1+9ef373dd259e-1.dsc: Upload failed: 403 Forbidden

Originally reported by Alexandre Rossi at https://alioth.debian.org/tracker/index.php?func=detail&aid=315172&group_id=100127&atid=413115