Data source Excel

Hello,

In my Testcase I want to check how the system replies, when a mandatory property is not set. I have for ex. 18 properties. I've created an Excel Sheet, and mapt it to the Request with SoapUI NG PRO Form. For each property I left an empty row in the Excel Sheet.

Lets say I want to send a SOAP request without the mandatory Property "name". So I let an empty cell , but SoapUI inserts it into the Request as an empty element instead of not including it at all. How to make it so that the request will have the property "name" not included as parameter?