E.g. https://connect.garmin.com/modern/activity/363072646 and https://connect.garmin.com/modern/activity/365629565
We both owned the same watch and ran together on this day. I don't know how some of his activities have gotten into my Garmin Connect but it was probably by mistake. Are you able to see serial numbers of these devices at all? If possible, I'd like to identify activities created with his Garmin 310XT watch and then delete them!
Please help :)