Leave meta keys alone
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@ -402,7 +402,7 @@ function woocommerce_process_shop_order_meta( $post_id, $post ) {
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$meta_values = $item_meta_values[$i];
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for ($ii=0; $ii<sizeof($meta_names); $ii++) :
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$key = sanitize_title($meta_names[$ii]);
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$key = esc_attr( $meta_names[$ii] );
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if ($key && $meta_values[$ii]) :
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$item_meta[$key] = woocommerce_clean( $meta_values[$ii] );
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endif;
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