I invoiced customer only 1 item. But i can add credit notes multiple times (2 items)

****{I don't want my accountant have the ability to do this.}***** 

**Which can lower down my customer debt. increase my inventory.**

>>>can make my 'Profit&loss, Inventory, Customer debt' to be inncorrect.

How can i disable this. 

My example 1       imgur.com/a/mLX0QU9  ( 1 item sale, but 2 item return in) 2 credit notes

My example 2       imgur.com/a/O6Kg23I ( 5 item sale, but 10 item return in) 1 credit note