Woocommerce 2.6 new features

While trying to add 120 shippnig zones with specific shippnig methods for each one by my specific plugin I’ve gor Apache|MySQL errors in log:
Mon Aug 22 17:39:34 2016] [warn] [client 5.19.1.112] mod_fcgid: stderr: \t \tFROM bip_woocommerce_shipping_table_rates as rate, referer: https://esliff.ru/wp-admin/
[Mon Aug 22 17:39:34 2016] [warn] [client 5.19.1.112] mod_fcgid: stderr: \t \tLEFT JOIN bip_woocommerce_shipping_zone_shipping_methods methods ON(rate.shipping_method_id = methods.shipping_method_id), referer: https://esliff.ru/wp-admin/
[Mon Aug 22 17:39:34 2016] [warn] [client 5.19.1.112] mod_fcgid: stderr: \t \tLEFT JOIN bip_woocommerce_shipping_zones zone ON(zone.zone_id = methods.zone_id), referer: https://esliff.ru/wp-admin/
Me code is simple

$available_zones = WC_Shipping_Zones::get_zones();
// Get all WC Countries
//$all_countries  = WC()->countries->get_countries();
//Array to store available names
$available_zones_names = array();
// Add each existing zone name into our array
foreach ($available_zones as $zone ) {
	if( !in_array( $zone['zone_name'], $available_zones_names ) ) {
		$available_zones_names[] = $zone['zone_name'];
	}

}

unset($available_zones);

$row = 0;

$handle=fopen(plugins_url( 'cdek5.csv' , __FILE__ ), "r");

while (!feof($handle)) {
    $data[$row] = explode(";" , fgets($handle, 14096));
    $row++;  

}

fclose($handle);
//var_dump ($data);
 if  (  in_array( $data[0][0], $available_zones_names ))goto ending ;

	for ($i = 0; $i < $row; $i++) {

if( ! in_array( $data[$i][0], $available_zones_names )){
	// Create an empty object
	$zone_new = new stdClass();
	//Add null attributes
//	$zone_new->zone_id = null;
//	$zone_new->zone_order =null;
	// Add shipping zone name
	$zone_new->zone_name = $data[$i][0];
	// Instantiate a new shipping zone with our object
	$new_zone_new = new WC_Shipping_Zone( $zone_new );
	// Add Croatia as location
	$new_zone_new->add_location( $data[$i][3], 'postcode' );
	// Save the zone, if non existent it will create a new zone
	$new_zone_new->save();
  $available_zones_names[]= $data[$i][0];
   } 

  else {
$available_zones = WC_Shipping_Zones::get_zones();
// Get all WC Countries
//Array to store available names
// Add each existing zone name into our array
foreach ($available_zones as $zone ) {
	if ( $data[$i][0] == $zone['zone_name']) {
  $curr_id = $zone['zone_id'];
  break;
	}

}

  unset($available_zones);

  $new_zone_new = WC_Shipping_Zones::get_zone ($curr_id);

  }

  if (!empty($data[$i][4])){
   $my_instance = $new_zone_new->add_shipping_method( 'My_pvz' );
  $my_method= new My_PVZ_delivery($my_instance);
  $my_method->instance_settings['cost'] = $data[$i][4];
  $my_method->instance_settings['title'] = 'Курьерская до двери';
  update_option( $my_method->get_instance_option_key(), $my_method->instance_settings );

  }
  if (!empty($data[$i][5])){
  $my_instance=$new_zone_new->add_shipping_method( 'My_pvz' );
  $my_method= new My_PVZ_delivery($my_instance);
  $my_method->instance_settings['cost'] = $data[$i][5];
  $my_method->instance_settings['title'] = 'Самовывоз: '. $data[$i][2];
  update_option( $my_method->get_instance_option_key(), $my_method->instance_settings );

  }     

	// Add our shipping method to that zone

  } //цикл перебора строк  

  ending: