Multivendor Add product code duplicate issue

	/**
	 *
	 */
	protected function checkProductCode(&$product) {
		$config = hikamarket::config();

		//
		// Vendor Prefix
		//
		$vendor_id = hikamarket::loadVendor(false, false);
		$vendor_prefix = $config->get('prefix_product_code', null);
		if(!empty($vendor_prefix) && $vendor_id > 1) {
			$prefix = 'v' . $vendor_id . '_';
			if(is_string($vendor_prefix)) {
				$prefix = $vendor_prefix . $vendor_id . '_';
				if(strpos($vendor_prefix, '%d') !== false)
					$prefix = sprintf($vendor_prefix, $vendor_id);
			}
			if(substr($product->product_code, 0, strlen($prefix)) != $prefix)
				$product->product_code = $prefix . $product->product_code;
		}

		//
		// Duplicate product code check
		//
		if(!$config->get('abort_duplicate_product_code', 0))
			return;

		// Get the current product_id or determine which value it will be
		//
		if(!empty($product->product_id)) {
			$futur_product_id = $product->product_id;
		} else {
			$query = 'SELECT MAX(`product_id`) FROM '.hikamarket::table('shop.product');
			$this->db->setQuery($query);
			$futur_product_id = (1 + (int)$this->db->loadResult());

			// Generate a product code based on what we have
			//
			if(empty($product->product_code)) {
				$test = '';

				if(!empty($product->product_name)) {
					$search = explode(',','ç,æ,œ,á,é,í,ó,ú,à,è,ì,ò,ù,ä,ë,ï,ö,ü,ÿ,â,ê,î,ô,û,å,e,i,ø,u');
					$replace = explode(',','c,ae,oe,a,e,i,o,u,a,e,i,o,u,a,e,i,o,u,y,a,e,i,o,u,a,e,i,o,u');
					$test = str_replace($search, $replace, $product->product_name);
					$test = preg_replace('#[^a-z0-9_-]#i', '', $test);
				}

				if(empty($test)) {
					$product->product_code = 'product_' . $futur_product_id;
				} else {
					$test = str_replace($search, $replace, $product->product_name);
					$product->product_code = preg_replace('#[^a-z0-9_-]#i', '_', $test);
				}
			}
		}

		if(!empty($product->product_code)) {
			if(empty($product->product_id)) {
				$query = 'SELECT COUNT(*) FROM '.hikamarket::table('shop.product').' WHERE product_code = '.$this->db->Quote($product->product_code);
				$this->db->setQuery($query);
				$isSame = ((int)$this->db->loadResult() > 0);
			} else {
				$query = 'SELECT COUNT(*) FROM '.hikamarket::table('shop.product').' WHERE product_code = '.$this->db->Quote($product->product_code).' AND product_id != '.(int)$product->product_id;
				$this->db->setQuery($query);
				$isSame = ((int)$this->db->loadResult() > 0);
			}

			if($isSame) {
				if(HIKASHOP_J30)
					$productCodeEscaped = "'" . $this->db->escaped($product->product_code . '_', true) . "%'";
				else
					$productCodeEscaped = "'" . $this->db->getEscaped($product->product_code . '_', true) . "%'";
				$query = 'SELECT product_code FROM '.hikamarket::table('shop.product').' WHERE product_code LIKE '.$productCodeEscaped;
				if(!empty($product->product_id)) {
					$query .= ' AND product_id != '.(int)$product->product_id;
				}
				$query .= ' ORDER BY product_code DESC';
				$this->db->setQuery($query, 0, 1);

				$last_product_code = $this->db->loadResult();
				$suffix = substr($last_product_code, 0, strlen($product->product_code) + 1);
				if(!empty($suffix) && (int)$suffix > 0)
					$product->product_code .= '_' . ((int)$suffix + 1);
				else
					$product->product_code .= '_' . $futur_product_id;

				$warning_message = JText::_('WARNING_DUPLICATE_PRODUCT_CODE_MODIFIED');
				if(!empty($warning_message)) {
					$app = JFactory::getApplication();
					$app->enqueueMessage($warning_message);
				}
			}
		}
	}

	public function save(&$product) {
		JPluginHelper::importPlugin('hikamarket');
		$productClass = hikamarket::get('shop.class.product');
		$status = $productClass->save($product);
		return $status;
	}

	public function save(&$product) {
		$this->checkProductCode($product);

		JPluginHelper::importPlugin('hikamarket');
		$productClass = hikamarket::get('shop.class.product');
		$status = $productClass->save($product);
		return $status;
	}

INSERT INTO `joom25`.`#__hikamarket_config` (`config_namekey`,`config_value`,`config_default`) VALUES ('abort_duplicate_product_code','1','0')

	public function save(&$product) {
		$this->checkProductCode($product);
 
		JPluginHelper::importPlugin('hikamarket');
		$productClass = hikamarket::get('shop.class.product');
		$status = $productClass->save($product);
		return $status;
	}