How to stop activity sync with Edge 540

How can I stop activity sync between my Fenix 3, Swim and FR 255 with Edge 540?

I do not want all these data on my Edge.

I had Fenix 3 and Swim, after that I bought 540 and Connect set it to primary training device and start sync all activities with it.

After that I got FR 255 and now it is set as Primary wearable and primary training device.

Why in this case all the activities continue to sync with 540?