wc_doing_it_wrong

I get this warning when exporting orders:

Parent was called incorrectly. Product properties should not be accessed directly.

Backtrace: do_action(‘wp_ajax_order_exporter’),
WP_Hook->do_action,
WP_Hook->apply_filters,
WC_Order_Export_Admin->ajax_gate,
WC_Order_Export_Admin_Tab_Abstract->ajax_export_part,
WC_Order_Export_Engine::build_file,
WC_Order_Export_Data_Extractor::fetch_order_data,
WC_Order_Export_Data_Extractor::fetch_order_products,
WC_Order_Export_Order_Product_Fields->get,
WC_Abstract_Legacy_Product->__get,
wc_doing_it_wrong. This message was added in version 3.0.

Just for you to know this