This field is only available when you are importing cards, sales, purchases, activity slips, timesheets, disbursements, receipts and items. It is also available when importing Reminder Logs, but with only two choices—Card and Reminder Log Record ID and when importing Items, but with only two choices-Item Number or Item Record ID.
If you want to continue with the importing process, click Continue and locate the file that contains the data you want to import.