DBMS_XMLSTore.insertXML with a value that is XML

I have an xml doc that looks like this:


<RowSet>
  <Row>
    <Config>
      <SubConfig>
        ...
      </SubConfig
    </Config>
  </Row>
</RowSet>

Where Config is the column name (type CLOB), and all the inner xml is the value.

I'm calling DBMS_XMLStore like this:


xmlDoc CLOB := 'xml from above goes here';
rows := DBMS_XMLSTORE.insertXML(insCtx, xmlDoc);

However I get the following error:


ORA-19200: Invalid column specification

How do I insert values which are xml themselves?