CSV not updating Assets

[Benjamin Leidner]

Hello all.  Hoping someone can help me.  I imported objects from a CSV, including an integer attribute named "Purchase_Approval_Limit"

Now, I've updated that attribute on all objects in the CSV and do another import but the values aren't changing.  No errors, no duplicates, just no updates (log shows Updated Objects = 0)

In my schema, the label is "Name" and I have Name ticked in the box as the identifier in the data source field in the import attributes mapping.  What am I doing wrong?

Thanks!