I ran a Marathon a couple of weeks ago in Madrid and ran a personal record. However, because I was running in a city centre with tall buildings my watch GPS glitched a little throughout the race. The final distance was around 43km but obviously the Marathon was really only 42.2km. This means that the Garmin App logged a time of 3:47 for my Personal Record but my time was actually around 3:52.
I edited the distance in Garmin to the correct distance, and the activity now shows 42.2km but the PR is still showing 3:47. I don't want to reject the PR because I did run a fastest time but I also don't want it logged 5 minutes too fast! How do I resolve this?