Description
The Feature ID role field is used to collapse duplicate features in the reference data for each primary locator role. Mapping the Feature ID role field when there are no duplicate features in the primary reference data causes reduced performance of the locator. This field should only be mapped when there are duplicate features in the primary data that have different attribute values, for example, an alternate street name. In this case, the data must have a field that contains a flag that indicates which street name is the primary name and you must also map the Primary Street Name Indicator role field. If the feature ID is mapped, the Primary Street Name Indicator role field is used to define the Preferred street name value of features with the same feature ID.
Solution
Ensure that the Feature ID role field is not mapped when there are no duplicate features in the primary reference data.