Proxy with enrich mediator sends HTTP 200 together with a custom message

<?xml version="1.0" encoding="UTF-8"?>
<proxy xmlns="http://ws.apache.org/ns/synapse"
       name="200Proxy"
       transports="https,http"
       statistics="disable"
       trace="disable"
       startOnLoad="true">
   <target>
      <inSequence>
         <log level="custom">
            <property name="it" value="** Its Inline Sequence ****"/>
         </log>
         <loopback/>
      </inSequence>
      <outSequence>
         <property name="HTTP_SC" value="200" scope="axis2"/>
         <enrich>
            <source type="inline" clone="true">
               <soapenv:Envelope xmlns:soapenv="http://www.w3.org/2003/05/soap-envelope">
                  <soapenv:Header/>
                  <soapenv:Body>DIMUTHUD</soapenv:Body>
               </soapenv:Envelope>
            </source>
            <target type="envelope"/>
         </enrich>
         <property name="messageType" value="application/soap+xml" scope="axis2"/>
         <header name="To" action="remove"/>
         <property name="RESPONSE" value="true" scope="default" type="STRING"/>
         <send/>
      </outSequence>
   </target>
   <description/>
</proxy>