java - delete the previous node in java using jdom

Question

Here is my code:

SAXBuilder builder = new SAXBuilder();
File xmlFile = new File( "fichadas.xml" );
try
{
    Document fichero = (Document) builder.build( xmlFile );
    Element rootNode = fichero.getRootElement();
    for (Element tabla : rootNode.getChildren( "fichada" )) {
        String term = tabla.getChildTextTrim("N_Terminal");
        String tarj = tabla.getChildTextTrim("Tarjeta");
        String fech = tabla.getChildTextTrim("Fecha");
        String horaEnXML = tabla.getChildTextTrim("Hora");
        String caus = tabla.getChildTextTrim("Causa");    

        //HERE I WANT TO DELETE THE PREVIOUS NODE NOT THE ACTUAL
        tabla.detach();

    }
    //OVERWRITING THE DOCUMENT
    try (FileOutputStream fos = new FileOutputStream("fichadas.xml")) {
        XMLOutputter xmlout = new XMLOutputter();
        xmlout.output(fichero, fos);
    }
} catch ( IOException io ) {
    System.out.println( io.getMessage() );
} catch ( JDOMException jdomex ) {
    System.out.println( jdomex.getMessage() ); 
}

I have some problems, i think that if i made the detach from the actual node i can't go to the next, then i'm trying to find the way to delete the previous node and delete and the begging of the loop, how can i do it?