Undefined array key error | WordPress.org

Hi, This error appears when the customer returns to the shop after making a purchase.　How can I fix it?

Warning: Undefined array key 0 in /home/c0837757/public_html/wanfeel.info/wp-content/plugins/woocommerce-payments/vendor/automattic/jetpack-sync/src/modules/class-woocommerce-hpos-orders.php on line 204