Assets

I am gathering hundreds of various products for ewaste.  When I went to upload the CSV to update the current haul, Source Field matched Target Field in IIQ and the sample shown for each column.  None of them include the model (too many to add).  However, after analyzing, IIQ shows Data that will be skipped with the reason “model is required.” In another asset import with the same set up, 90 out of 890 items were flagged the same way… but the majority updated. What can I enter to ignore the model number error?  Thank you. 

Is there a way to match asset location to assigned user location?