Impossible to create negative Sales Invoice (Partial return for which we cannot reference exsiting Sales Invoice)

Hi,

We are in a distribution business. In our old system we were able to create negative Sales Invoice for our clients which would create a Credit Note and put the items back in the inventory. It’s almost impossible for us to find the initial Sales Invoice when processing a return. As of now, in ERPNext we are unable to create negative Sales Invoice so we can’t process any of our returns since we can’t reference the initial Sales Invoice. How can we disable the “Total must be > 0$” validation?

This is a very big issue for us

Thanks,

G.