Blank/Clear a Field with DMT

I need to blank/clear the “Supplier” field in the “Urgent Planning” section on the “Part → Sites → Detail” tab on the part maintenance screen. What value, or lack thereof, do I need to include on the upload file to blank/clear the current value?

Try uploading an empty cell in PartPlant.UrgentVendorVendorID

Thank you very much :slight_smile: