Error log

As a client I do not want to see the following error in my log files:

[20-Mar-2019 12:53:49 UTC] billing_email was called incorrectly. Order properties should not be accessed directly. Backtrace: do_action(‘wp_ajax_wc_postnl’), WP_Hook->do_action, WP_Hook->apply_filters, WooCommerce_PostNL_Export->export, WooCommerce_PostNL_Export->add_shipments, WC_Order->update_status, WC_Order->save, WC_Order->status_transition, do_action(‘woocommerce_order_status_completed’), WP_Hook->do_action, WP_Hook->apply_filters, WPfeedback->wc_feedback, WC_Abstract_Legacy_Order->__get, wc_doing_it_wrong. This message was added in version 3.0. [20-Mar-2019 12:53:49 UTC] id was called incorrectly. Order properties should not be accessed directly. Backtrace: do_action(‘wp_ajax_wc_postnl’), WP_Hook->do_action, WP_Hook->apply_filters, WooCommerce_PostNL_Export->export, WooCommerce_PostNL_Export->add_shipments, WC_Order->update_status, WC_Order->save, WC_Order->status_transition, do_action(‘woocommerce_order_status_completed’), WP_Hook->do_action, WP_Hook->apply_filters, WPfeedback->wc_feedback, WC_Abstract_Legacy_Order->__get, wc_doing_it_wrong. This message was added in version 3.0. [20-Mar-2019 12:53:49 UTC] billing_first_name was called incorrectly. Order properties should not be accessed directly. Backtrace: do_action(‘wp_ajax_wc_postnl’), WP_Hook->do_action, WP_Hook->apply_filters, WooCommerce_PostNL_Export->export, WooCommerce_PostNL_Export->add_shipments, WC_Order->update_status, WC_Order->save, WC_Order->status_transition, do_action(‘woocommerce_order_status_completed’), WP_Hook->do_action, WP_Hook->apply_filters, WPfeedback->wc_feedback, WC_Abstract_Legacy_Order->__get, wc_doing_it_wrong. This message was added in version 3.0. [20-Mar-2019 12:53:49 UTC] billing_last_name was called incorrectly. Order properties should not be accessed directly. Backtrace: do_action(‘wp_ajax_wc_postnl’), WP_Hook->do_action, WP_Hook->apply_filters, WooCommerce_PostNL_Export->export, WooCommerce_PostNL_Export->add_shipments, WC_Order->update_status, WC_Order->save, WC_Order->status_transition, do_action(‘woocommerce_order_status_completed’), WP_Hook->do_action, WP_Hook->apply_filters, WPfeedback->wc_feedback, WC_Abstract_Legacy_Order->__get, wc_doing_it_wrong. This message was added in version 3.0.