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Track calibration ruined my run activity. Can I roll back to raw data?

I'm very dissapointed. I've been using Track run for a months on the same place. Track run calibration never worked for me. Suddenly it started to work today, however, it snaps on track way too big! Check the picture. This produced completely wrong results.  

Not sure why it happens. lap is about 300m long. maybe it is too short? Auto lap is turned off. I always run in Track 3 and that is set.
When calibration was not working, recorded lines was about within width of all tracks.
I'm giving up of track calibration because I'll rather live with small error than being desperate with completely ruined activity record.

Saying that, is it possible to revert to raw data of the activity?? If it is possible it would save my day!!!