So when you copy/ paste you are actually just working with a layer, which will be evidenced by the green paper icon in front of the layer in your tree view of the field.
The yield data can actually be Split to account for this kind of problem. If you were to draw around the base yield data that belongs to another field, it will turn black when selected, right click in this area and select split, it will create a new job for just this data which can be edited in the job list to be moved to the correct field. Then like multiple jobs can be merged.
I believe there is helps available for just this sort of thing, pg 204 under mapping in the help PDF.
Edited 1 time(s). Last edit at 01/13/2018 10:55AM by Mitch Konen.