Merge branch 'sales_2001747_FixProductPriceValidation' into '2021.2.1'

[Projekt: xRM-Sales][TicketNr.: 2001747][Productprice: kein Preis anlegbar wegen Validierung]

See merge request xrm/basic!1418

entity/Productprice_entity/onValidation.js

@@ -81,7 +81,7 @@ if(vars.getString("$param.IgnoreOnValidation_param") != "true")
                 || Utils.isNullOrEmptyString(currPriceList["relationId"]) && Utils.isNullOrEmptyString(vars.get("$param.ContactId_param"))) 
                 && currPriceList["currency"] == currency)
             {
-                if(currPriceList["validFrom"] <= validFrom && (validTo >= currPriceList["validTo"] || Utils.isNotNullOrEmptyString(currPriceList["validTo"])))
+                if(currPriceList["validFrom"] >= validFrom && (validTo >= currPriceList["validTo"] || Utils.isNullOrEmptyString(validTo)))
                 {
                     result.string(translate.withArguments("There already exists a %0 price with the same type of pricelist, quantity and currency in the defined range.", [vars.get("$field.BUYSELL")]));
                 }