The field region forms the link between the field boundary and the cropping record. If you change a field’s boundary, it will change the boundary for that field in every cropping year where the cropping record is linked to the same region.
If you wish to make a change to the field boundary that only applies to certain years, or from the current year forwards, it is necessary to change the field region before making any changes to the field boundary.
This is also the case if you are importing new field boundaries captured with precision farming equipment, and want to update the records from the current year onwards, without affecting previous years.
Click here for a document containing instructions on changing the field region.