"Please configure the inventory detail for this line." ..I really wish Netsuite would include a clue in this CSV message when importing an Inventory Adjustment with 5,000 serial numbers for 800 items

That’s why I like to do each individual IA for items so you know which item is the issue

one IA per item?

I use separate external id for each item, there is a SA that shows you three file import external id, and external id2 that way if there is no issue in item it will go in and only legitimate issue one remains