There are several things to solve this,

- The Odoo log file usually provides detailed information about why the initialization is failing. You can find the log file at /var/log/odoo/odoo.log or wherever you have configured it to be. Look for any specific error messages that indicate what went wrong.

- Ensure that the database server is running and accessible by the Odoo user. You can test the connection using psql:

sudo -u odoo psql -d mydatabasename -c '\q'

If this command fails, there might be an issue with the database server or the database configuration.

-Make sure that the database user odoo has the necessary permissions on mydatabasename. You can check and update the permissions as follows:

sudo -u postgres psql
GRANT ALL PRIVILEGES ON DATABASE mydatabasename TO odoo;
\q

- Sometimes the failure can be due to issues in specific modules. You can try updating the database with individual modules to identify which one is causing the problem:

sudo -u odoo odoo -d mydatabasename -u base

- Clearing the Odoo cache can sometimes resolve issues

- Ensure your Odoo configuration file (/etc/odoo/odoo.conf or similar) is correct and points to the right database, user, and password.

- Ensure that the master password is correctly set in your Odoo configuration file.

- Run the upgrade command with debug mode enabled to get more detailed output.

- As a precaution, back up your database before running the update command:

sudo -u postgres pg_dump mydatabasename > mydatabasename_backup.sql

Hi dear . I have this problem now. did you found any solutions?