Before performing any migration, always make sure to back up your existing data, including the database and files related to your Odoo website.
Ensure that all custom modules, themes, and dependencies are compatible with the target version of Odoo. Some modules may need to be updated or replaced with newer versions that are compatible with your target Odoo version.
It's crucial to review the release notes and changelogs between your current version and the target version to understand the changes that may impact your website content.
Exporting data directly from the database or use specialized third-party modules for this purpose.
Transform or format the data to match the structure and requirements of the target Odoo version.
Importing the website content to the target Odoo instance. Depending on the volume and complexity of the data, this process may require careful handling to ensure data integrity.
Test the website's functionality, pages, and features to ensure everything works as expected. Pay attention to any discrepancies or issues that may have occurred during the migration process.
If you were using a custom theme in the source Odoo instance, you may need to check if it is compatible with the target Odoo version. Custom themes might require adjustments or updates to work correctly.
The needed customizations or modifications on your site recreate or update them to fit the new Odoo version's structure and API changes.
Tested the site and ensured everything is working as expected, you can deploy the migrated website to your production environment.