Recently I updated WordPress theme, the theme Zephyr requires at least mysql 5.6 and PHP 7, so I had to upgrade these environment. The environment was outof date secense last maintenance, I decided to update the lnmp environment and import the WordPress database after upgrade. To backup WordPress data is not very hard, just be careful about your database, config file, and media files. After upgrading, I import the whole database, but find a error notice when I create new post…