Error while importing your file
You will receive this error due to incorrect column mapping while uploading purchase invoice.
On the Upload Purchase Invoices XLS page, upload the XLS document and choose the correct XLS Data Format based on your file.
Click on Upload Purchase Invoices XLS File
Under Fields for Invoice details, choose the right column for Supplier GSTIN, Invoice Number, and Invoice Date.
Click on Process file upload
This error will occur if the columns are incorrectly mapped
Upload Purchase Invoice
Choosing Invoice details