Cannot insert data in CodeIgniter 3 where database and fields are using space

I've tried to insert data using database and table fields where naming the database uses spaces (this is from my office law). But there is a following error -
'Error Number: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'harian_copy1 (RecID, id_peminjaman, Tanggal, Cabang, Jenis Proyek,' at line 1'.

Controller:

public function inputalokasiharian() {
// Ambil data dari form atau sumber lainnya
    
    $RecID = $this->input->post('RecID');
    $id_peminjaman = $this->input->post('id_peminjaman');
    $Tanggal = $this->input->post('Tanggal');
    $Cabang = $this->input->post('Cabang');
    $Jenis_Proyek = $this->input->post('Jenis Proyek');
    $Nama_Proyek = $this->input->post('Nama Proyek');
    $Kode_Proyek = $this->input->post('Kode Proyek');
    $Jenis_Alokasi = $this->input->post('Jenis Alokasi');
    $Nama_Alokasi = $this->input->post('Nama Alokasi');
    $Jenis_Pekerjaan = $this->input->post('Jenis Pekerjaan');
    $keterangan = $this->input->post('keterangan');
    $persentase_hasil = $this->input->post('persentase_hasil');
    $jam_mulai = $this->input->post('jam_mulai');
    $jam_selesai = $this->input->post('jam_selesai');
    $ketercapaian = $this->input->post('ketercapaian');
    $bagian = $this->input->post('bagian');
    

    $data = array(
        'RecID' => $RecID,
        'id_peminjaman' => $id_peminjaman,
        'Tanggal' => $Tanggal,
        'Cabang' => $Cabang,
        'Jenis Proyek' => $Jenis_Proyek,
        'Nama Proyek' => $Nama_Proyek,
        'Kode Proyek' => $Kode_Proyek,
        'Jenis Alokasi' => $Jenis_Alokasi,
        'Nama Alokasi' => $Nama_Alokasi,
        'Jenis Pekerjaan' => $Jenis_Pekerjaan,
        'keterangan' => $keterangan,
        'persentase_hasil' => $persentase_hasil,
        'jam_mulai' => $jam_mulai,
        'jam_selesai' => $jam_selesai,
        'ketercapaian' => $ketercapaian,
        'bagian' => $bagian
    );

    $this->region_model->insertalokasiharian($data);
    $this->session->set_flashdata('message_input_ah','<div class="alert alert-success alert-dismissible mt-1 fade show" role="alert">Data alokasi harian berhasil dimasukkan
                                                          <button type="button" class="close" data-dismiss="alert" aria-label="Close">
                                                              <span aria-hidden="true">&times;</span>
                                                          </button>
                                                     </div>');
    redirect($_SERVER['HTTP_REFERER']);
}

Model:

public function insertalokasiharian($data) {
    $DB2 = $this->load->database('old_db', TRUE);
    return $DB2->insert('`ga - alokasi harian_copy1`', $data);
}