Activities duplicated

Today I noticed a sudden change in my fitness values, fitness had raised suddenly by 20 points. Looking for the cause I found that many of my zwift rides of the recent weeks seem to have been duplicated. There is one original version from zwift/strava and another new version from wahoo/strava although I have my wahoo roam off when riding on zwift. Maybe the activities come from my wahoo chest belt which has the ability to record activities offline??

My id is i278455.
Thanks for any help on how to fix this!

Ok, it seems this a known Wahoo problem. I will try to solve it like explained in this thread: Massive amount of Wahoo Duplicates after importing old data

Although, I must admit that I do not fully understand why this can’t be merged by intervals.icu since both activities are linked to the same strava activity!?

Another and maybe even easier way to clear suddenly appearing duplicates is to sort the activity list descending by “creation date”: