The other thing to consider changing is the password that Moodle uses to connect to the MySQL database. This is set in the MySQL DB, and also needs to be in Moodle's config.php file.
Security and privacy
Moodle Administrator moving on - Securing moodle site
Müzakirə kilidlənib, beləliklə ona cavab vermək artıq mümkün deyil.