Express document "Update was canceled" received from author "USER" (SOLVED)

[gustavo_concheto]

Hi everyone, 

I have the following problem, in tcode VA01 I create the sales order and save it, the message indicating the generated number of the saved order is displayed, when I change screens the message below is displayed:

In tcode ST22 generates a dump with the message VH 535 below related to the error

I've already investigated my pricing but I haven't identified any duplicate conditions, please guys, help me!

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Sirs, the problem was in the invoice-to-order copy control, in the formula that copies the VBAP data. After changing the standard formula, the problem was solved.