What should be done if item codes in the import template are duplicated?

When dealing with item codes in an import template, having unique identifiers is crucial for the proper functioning of inventory management systems like Xero. The correct approach is to make the item codes unique by adding an additional character or modifying them in some way. This ensures that each item is distinctly identifiable, which prevents confusion during data processing and keeps inventory records accurate.

Making the item codes unique allows the system to correctly associate transactions, sales, and stock levels with the correct items. This step is essential for maintaining the integrity of the data being imported. If duplicates were left unchanged, it could lead to errors in inventory tracking, reporting, and overall management of items within the software. Therefore, modifying the item codes to ensure their uniqueness is the best practice in this scenario.