OpenCart 2.1.0.2 suddenly crashed

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2016-06-29 15:52:04 - PHP Notice:  Undefined variable: product_id in /home/tyleetw/public_html/catalog/controller/account/wishlist.php on line 115

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				$this->model_account_wishlist->deleteWishlist($product_id);

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2016-06-29 16:24:40 - PHP Notice:  Undefined index: override in /home/tyleetw/public_html/catalog/controller/api/order.php on line 767

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				$this->model_checkout_order->addOrderHistory($order_id, $this->request->post['order_status_id'], $this->request->post['comment'], $this->request->post['notify'], $this->request->post['override']);