Remove empty ns attribute from SOAP request using EndpointInterceptor

There is this legacy system which is sending SOAP requests with an empty namespace attribute causing fields values to be null, when namespace attribute is removed while testing from SOAP UI, it work fine.

This is what problematic SOAP request looks like

<?xml version="1.0" encoding="UTF-8"?>
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"
    xmlns:xsd="http://www.w3.org/2001/XMLSchema"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <soapenv:Body>
        <ADD xmlns="http://www.cc.com/ws">
            <ID xmlns="">dummy</ID>
            <PWD xmlns="">password</PWD>
        </ADD>
    </soapenv:Body>
</soapenv:Envelope>

I tried by adding an interceptor using addInterceptors method of WsConfigurerAdapter, code of which is pasted below, but it doesn't work

@Override
public boolean handleRequest(MessageContext messageContext, Object endpoint) throws Exception {
    
    SOAPMessage soapMessage = ((SaajSoapMessage) messageContext.getRequest()).getSaajMessage();
    SOAPBody body = soapMessage.getSOAPBody();
    
    Iterator<SOAPBodyElement> it = body.getChildElements();
    while (it.hasNext()) {
        Object node = it.next();
        if (!isTextNode(node)) {
            com.sun.xml.internal.messaging.saaj.soap.ver1_1.BodyElement1_1Impl e = 
                    (com.sun.xml.internal.messaging.saaj.soap.ver1_1.BodyElement1_1Impl) node;
            
            Iterator<SOAPBodyElement> subItr = e.getChildElements();
            while(subItr.hasNext()) {
                Object subNode = subItr.next();
                if(subNode instanceof com.sun.xml.internal.messaging.saaj.soap.impl.ElementImpl) {
                    SOAPElement el = (SOAPElement) subNode;
                
                    el.removeAttribute("xmlns");
                }
            }
            
        }
    }
    
    soapMessage.writeTo(System.out);
    return true;
}