This may not be the automatic solution you’re looking for, but if you need to edit existing data manually, one data point at a time, check out Manually edit feed data (to delete bad data) - Is it possible? How?
This may not be the automatic solution you’re looking for, but if you need to edit existing data manually, one data point at a time, check out Manually edit feed data (to delete bad data) - Is it possible? How?