Allow Zero Valuation Rate option removed for Purchase Order and Purchase Receipt

I was searching through out the documentation
Purchase Order
Purchase Receipt
and I’ve found for both Purchase Order and Purchase Receipt something about “allow_zero_valuation_rate” option, yet, none of the child Doctypes appears to have that field. Is this a mistake or should I look for it somewhere else?

I’m currently using version 13.4.1
thanks in advance

I’m using v14 and it is available in the Purchase Receipt Item child DocType.