Re: "Cannot decrease quantity more than -1.000, since -1000 were already delivered" Error in an Sales Quotation

Hi,

I can reproduce that error as following:

1. Create Sales Quotation has quantity 2,000
2. Create Sales Order, copy from that Sales Quotation with quantity 1,000
3. Now back to Sales Quotation and change quantity less than 1,000 (for example 900), system will throw error like yours.

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Hope this helps,

TVSon