Foreword: If you encounter a problem, simply record that although there is a solution on the Internet, you should keep it for yourself to see. When you upgrade Wordpress, Wordpress will enter the database wp_ Add core in the options table_ Updater.lock record. If you interrupt the Wordpress upgrade halfway, such as closing the current page and refreshing the page, this record will be generated in the database. When Wordpress detects the existence of this record during the next upgrade, it will return "Another update is in progress". Solution: Manually delete wp_ Core in the options table_ Updater.lock records or executes the SQL statement: