Removing an activity from stats

I've found a couple other older posts that make it seem like it's not possible, but i'm hoping either things have changed or someone worked out a way to fix it.

I have moved from a Fenix 6 pro to a fenix 8 and out of interest wanted to record a ride wearing both watches so i could compare the data, mostly for heart rate accuracy. My Fenix 8 is set as my primary wearable and primary training device so i wasn't expecting the fenix 6 to count towards my training data, but now garmin connect has decided i was somehow able to do two rides simultaneously and has counted both towards my training load and recovery.

After reading some posts i'm now realising i should have disconnected the Fenix 6 to stop it syncing and just downloaded the fit file directly from the watch for comparison.

Is there any way to delete the activity or exclude it somehow so it's not counting towards my stats?