Portsnap Issue

I'm using FreeBSD 10.3 Release and I'm unable to update the ports system. The server date and time is set correctly (via ntpdate) nightly on crontab.
$ portsnap fetch update
Looking up portsnap.FreeBSD.org mirrors... 6 mirrors found.
Fetching snapshot tag from your-org.portsnap.freebsd.org... done.
Latest snapshot on server is older than what we already have!
Cowardly refusing to downgrade from Wed Oct 12 00:55:55 PDT 2016
to Mon Oct 10 12:04:19 PDT 2016.