Editing Past Activities Assigns Current Gear to Them
There is an issue with activities getting gear that did not exist at the time the activity was created. When I edit activity from the past, the activity gets my current gear. So, if I edit a run from 2 years ago that did not have any running shoes assigned - it will get my current running shoes assigned to the activity.
To fix it, I have "fake running shoes", but it's a hack. Strava - please allow to save an activity without assigning any equipment to it.