superset: Change the setting of superset from sqlite to MySQL - a problem!

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• [+ ] I have checked the superset logs for python stacktraces and included it here as text if any
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Superset version

version: 0.17.1

Hey. I want to change the standard database configuration from sqlite to mysql.

1. Added its configuration file superset_config.py and put it in PYTHONPATH

# Superset specific config
#---------------------------------------------------------
ROW_LIMIT = 200000
SUPERSET_WORKERS = 4

SUPERSET_WEBSERVER_PORT = 8088
#---------------------------------------------------------

#---------------------------------------------------------
# Flask App Builder configuration
#---------------------------------------------------------
# Your App secret key
SECRET_KEY = '\2\1t567fgj7dtghjdhfui64@#$&77cvw424tkey\1\2\e\y\y\h'

# The SQLAlchemy connection string to your database backend
# This connection defines the path to the database that stores your
# superset metadata (slices, connections, tables, dashboards, ...).
# Note that the connection information to connect to the datasources
# you want to explore are managed directly in the web UI
#SQLALCHEMY_DATABASE_URI = 'sqlite:////path/to/superset.db'
SQLALCHEMY_DATABASE_URI = 'mysql://superset:32rasdf356ytsdfDD@localhost/superset'

# Flask-WTF flag for CSRF
CSRF_ENABLED = True

# Set this API key to enable Mapbox visualizations
MAPBOX_API_KEY = ''

1. I’m executing the code Fabmanager create-admin --app superset

In my database mysql, tables have been added, as well as 1 user admin.

1. Then I execute the code: Superset db upgrade

At this point, the sqlite database is created! Why?

1. Then I execute the code: Superset init

And the changes are again happening in the database sqlite ! Why?

Thank you.