Hello Folks,

As the subject, below is the case please help me.

Impacted versions: 13.0

Steps to reproduce:

​​Create Sales order(with service product) and advance invoice with the full amount for the same invoice. 

Generate credit note against down payment with full amount and mark it as paid.

Create a final invoice system that will raise warning 'There is no invoiceable line. If a product has a Delivered quantities invoicing policy, please make sure that a quantity has been delivered.'

Current behavior:

Expected behavior:

It should create a final invoice

For more information please check below video (optional):

https://www.youtube.com/watch?v=tEe9-mI5lNc&feature=youtu.be