duplicate data when connecting multiple devices.

I have a Fitbit and Oura Ring, and I can see that my activity data gets counted twice when activity data from both are integrated.
It looks like I can only select one of them when it comes to activity data, but I am not sure which one to choose (does anyone have insight into if one is more reliable than the other?).
I was wondering if it would be possible to average the data from both devices instead of having to choose one.
Thanks!