ขอตวามช่วยเหลือหน่อยครับ Error : You must use the "set" method to update an entry.

 public function NewsAddSubmit()
    {
         $this->load->library('upload');

        // |xlsx|pdf|docx
        $config['upload_path'] = './uploads/News';
        $config['allowed_types'] = 'gif|jpg|png|jpeg';
        $config['max_size']     = '200480';
        $config['max_width'] = '5000';
        $config['max_height'] = '5000';
        $name_file = "News-".time();
        $config['file_name'] = $name_file;

  
        $this->upload->initialize($config);

        $data = array();

            if ($_FILES['file_name']['name']) {           
                if ($this->upload->do_upload('file_name')){

                    $gamber     = $this->upload->data();

                    $data = array
                    (
                        'file_name'     => $gamber['file_name'],
                        'title'         => $this->input->post('title') , 
                        'description'   => $this->input->post('textarea') , 
                        'status'        => $this->input->post('radio') , 
                        'create_at'     => date('Y-m-d H:i:s') 
                    );

                }
            }

            $resultsedit = $this->db->insert('tbl_news',$data);

            if($resultsedit > 0)
            {
                $this->session->set_flashdata('response','Update News Successfully.');
            }
            else
            {
                $this->session->set_flashdata('msg','Failled to News!!');
            }
            return redirect('News');
    }