Before proceeding, ensure you have a backup of your current data in case you need to restore it later.

Option 1.

Do you have a backup from the first day? If so, you can simply restore it.

Option 2.

Access the Odoo Shell:

Connect to your Odoo server using SSH or another method that allows you to access the command line.

Reset Database:

Use the following command to reset your Odoo database:

odoo-bin --db_host=localhost --db_user=DB_USER --db_password=DB_PASSWORD -d YOUR_DATABASE_NAME -r DB_USER --wipe

Replace DB_USER, DB_PASSWORD, and YOUR_DATABASE_NAME with your actual database user, password, and name.

Restart Odoo:

After the reset, restart your Odoo server to apply the changes.