Primefaces row edit hatasi?

Selam.Primefacesin Row edit ediyorum. onEdit metodumda baska bir tableye insert yapmak istiyorum hata veriyor. Neden ola bilir?

public void onEdit(RowEditEvent event) throws ClassNotFoundException, SQLException{

    MonthReport e = (MonthReport) event.getObject();
    monthsreports = new Monthsreports();
    monthsreports.setId(e.getId());
    monthsreports.setProductname(e.getName());    
    monthsreportsFacadeLocal.create(monthsreports);

    FacesContext context = FacesContext.getCurrentInstance();
    context.addMessage(null, new FacesMessage("updated  successfully"));

}