Cause:

1. If the user has already created the e-Invoice of the selected bill and again uploading the same Bill e-Invoice.

2. If there is some issue in e-Invoice Server while uploading e-Invoice.

In order to resolve the error of 'Duplicate IRN', the user needs to follow the below steps:

• Go to Gst > Generate eInvoice.

• An 'eInvoice Summary' window will appear.

• In 'Period' field, the user will mention the Date Range as per the requirement.

• Then click on 'Show' .

• The user can view the selected Date Range Bills will be show.

• The user will select the Bill which is showing error(as show below).

• Suppose select 'A000031'.

• The user will click on 'Get IRN'.

After Following the above steps, the alert of 'Successfully Generated' will appear and e-Invoice will be upload.