Copy planned to actual overwrites weight, body fat, etc.

When copying training data from planned to actual, it overwrites any training data as expected but it also overwrites any weight, bodyfat, and other such data. Can what gets overwritten be limited to training data and not the other non-training data? Or maybe, only the fields that have data (like the bike section, not the run section if there is only bike in the planned data) will copy over and overwrite.

Thanks,
Mike