Error when migrating from SQLite to MySQL

Hello, I am new to OpenNebula. I am developing a project to implement a private cloud, I have managed to install the entire system but I want to change from SQLite to MySQL, I do the procedure indicated on the page but when I start I get an error which does not allow me to start the demon opennebula (I am using OpenNebula 5.12 in Centos 8 virtualized in virtualbox).

$ mysql -u root -p
Enter password:
Welcome to the MySQL monitor. [...]

mysql> GRANT ALL PRIVILEGES ON opennebula.* TO 'oneadmin' IDENTIFIED BY '<thepassword>';
Query OK, 0 rows affected (0.00 sec)

# Sample configuration for MySQL
DB = [ backend = "mysql",
       server  = "localhost",
       port    = 0,
       user    = "oneadmin",
       passwd  = "<thepassword>",
       db_name = "opennebula" ]

error starting opennebula daemon

Hi, you need start opennebula service as “standalone”, that populate the db, after that, you can change to master or slave in oned.conf. cheers.

starts normally but starting without changing the parameters would not fill the database in Sqlite?

yes, should. I don’t remember if you need to create a empty sqlite file before or is created starting the service.