How to Fix workout distance and pace?

Hi, I’m currently running on a track and Garmin miscounts total distance and pace.
So instead of 14 miles, I got 11 miles, and pace is 10 min per mile instead of 7.50. HR and total times are correct. I see that I can ignore pace, but can I fix it ?

There isn’t any way to fix such bad data in Intervals.icu. You can fix up bad HR, power etc. in various ways but not insert a whole bunch of missing data. Maybe there is a tool somewhere that can edit the fit file?

You can fix bad GPS data on GOTOES.org I think. Worth a look in any case