New Root appears for data when rendering form

We are using the sample code below to render the form.

Just recently, we noticed that when the form is rendered and the XML is exported using Adobe Acrobat, we see a new root showing on top of the previous root node. For example, of the data structure looks as follows:

<root>  <customer_name>John</customer_name></root>

it will become like the following:

<xfa:data>  <root>    <customer_name>John</customer_name>  </root></xfa:data>

Sample code used:

    PDFFormRenderSpec pdfFormRenderSpec = new PDFFormRenderSpec(    true, //boolean cacheEnabled    null,//PDFVersion    true,//boolean taggedPDF    false,//boolean linearizedPDF    null,//String seedPDF    AcrobatVersion.Acrobat_9,    null,//String xCIURI    sCharSet,//String charset    RenderAtClient.Yes,//key to dynamic forms!    sLocale,// locale    false, //standAlone    FormModel.both,    false//setXML    );                                      //Specify URI values that are required to render a form            URLSpec uriValues = new URLSpec();            uriValues.setContentRootURI("repository:///");                               //Invoke the renderPDFForm method and write the            //results to a client web browser            FormsResult formOut = formsClient.renderPDFForm(                        formName,               //formQuery                        oInputData,             //inDataDoc                        pdfFormRenderSpec,      //PDFFormRenderSpec                        uriValues,                //urlSpec                        null            //attachments                        );                   //Create a Document object that stores form data            myData = formOut.getOutputContent();            myData.passivate();            myData = readerExtensionsApply(sRECert, myFactory, myData);

Appreciate your help to resolve this problem.

Tarek