Tvheadend

I recently had an issue with the machine I am running on which meant that the time was wrong for a period of time. This meant that the recordings made during this time where of the wrong programme because the time was wrong but I have many recordings before this failure still in my library. Is there any way to keep the old programmes and rerecord the incorrect ones. One solution I thought of was to re record programmes if they later became available which I believe is possible on Myth TV. I have looked but can't seem to find any way of doing this. Is this possible?