How to update purchase order items prices after purchase receipt has been submitted?

Hello,

I’m currently evaluating ERPnext for my business, and I’m very excited, this appears to be quality software :slight_smile:

However, one of my suppliers is a bit chaotic, and it regularly happens that I get an invoice after items are delivered, and I usually do not know the exact purchase amount before I get the invoice. So I would create the purchase order with Prices of 0, then store/book the items to a warehouse with Purchase Receipt ready to be used, and then adjust the rate when entering Purchase Invoice when I finally get the invoice. However, the Update Items button for the purchase order vanishes after entering receipt of items. Is there a way to prevent this? Wouldn’t it make more sense to lock this function only after entering the purchase invoice?

And in general: if I want to change this kind of business logic, is this a modification in the source code, or is there a frontend facing way to build and adapt changes like this?

thanks a bunch for any insight,
Philip

I will just answer my own question right away, it works by following the documentation here: Buying Settings

Very nice software indeed <3