I have a Garmin Edge 520 and a Forerunner 920XT. The Forerunner is used to record my bike rides, the Edge to see the data while riding.
Today, I transferred a course to the Edge. With this action, all my saved activities were uploaded to Garmin Connect. - As a result, every bike ride from the 520 is now duplicated in Garmin Connect (The second entry was stored with the FR 920).
How can I search and delete for all activities in Garmin Connect that were created by a specific device (in my case the Edge 520)?