备注: 环境启用了 title 模块, product 变体的title 是 title_field 字段
vim profiles/commerce_kickstart/modules/contrib/inline_entity_form/includes/commerce_product.inline_entity_form.inc
340 public function createClone($entity) {
341 $cloned_entity = parent::createClone($entity);
342 $cloned_entity->sku = NULL;
343 $cloned_entity->uuid = NULL; //uuid 不会自动更新的修复
344 $cloned_entity->vuuid = NULL; //vuuid 不会自动更新的修复
345 $cloned_entity->title = NULL; //title 模块启用后无效无效
346 $cloned_entity->title_field = NULL; //针对title 模块有效