Log into the NPI client application.
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Select Libraries
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> Part Library.
Select the tab that corresponds to the part type (IPN, MPN, VPN, CPN) you want to delete.
Locate and select the part number you want to delete, then select the Delete
button.When the confirmation message displays, select OK to delete the part.
Warning icon false title Warning! If you delete a part number from the Part Library, you can't recover it.