Additional ideas under the subject "Let us be able to control the pairing of our activities"
Even better would be that the automatic pairing got an update, got “smart”, so that it does not pair automatically with a too remotely different activity. Even better-better, it would automatically re-pair with the correct activity (optimized by length/name) when several are executed the same day. In the first place, programs should probably simply not autopair with an activity without TSS. At least all this could be allowed to be changed in settings. Another option: it would be cool to be able to drag-and-drop the executed workout that one wish to pair with the planned workout which automatically got paired wrongly with, say, a commute without TSS, so that a new and correct repairing happens in one sweep move, as the wrongly paired executed workout should get unpaired by the drag-and-drop by another executed workout into the planned workout. I hope the team would take it into consideration.
At the very, very least please make it possible to at least turn on/off automatic pairing when the functionality of autopairing is so low and nonsensically rigid. That is setting the bar very low, please.

There should be no rules/reason to prevent a completed workout being unpaired.

I often do a Zen8 indoor swim session rather than a midweek swim, but can't unpair it from the planned swim workout.