When you are updating existing data in the system, it is best to first download the existing data. This ensures that you have the most recent data from within the system, which helps ensure accuracy.
To download the existing data, open the Data Load Wizard, select the type of data you are loading, and on the Upload page click the Get Existing Data link in the lower-left corner. This takes you to the appropriate report page for the selected data type, if available.
When getting existing data, please consult the system requirements outlined in the Helpful Hints to ensure that the data is ready for loading.