Try to log a voucher using 3 way match with error 1760


I created Purchase Order with lines of GL account with zero amounts. Then I created a voucher using 3 way match over tolerance and changed the amounts of PO lines but the following error raised for these lines:
Error 1760 - If the Zero amount control field equal to yes, the amount field must be equal to zero.

Could you please help where I can find this control field?

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