Inventory mismatch with Invoice

First of all thanks a lot for providing this software that too free of cost…

I have a query, if already discussed please post the link so that I can refer it as I was unable to find the solution.

  1. Entered Start Date of Business as 1st April, 2018
  2. I have a stock which I purchased last year
  3. I created one customer as Mr A
  4. I added 1 inventory item ABC having qty as 1
  5. When I create Sales Invoice for item ABC and mention qty as 2, invoice generates

My query, even though qty is 1, but invoice is getting generated for 2 qty as well…
Is it possible that, I get error, if I generate invoice with qty > available inventory

This has been discussed many, many times in the forum. Manager does not prevent you from selling items you do not yet have in inventory because many businesses do this routinely, then order the items from a supplier. Some businesses even have the supplier ship to the customer.

Thanks a lot for clearing my doubt…