Some of the most common issues that can make a test fail while upgrading from Odoo 17 to Odoo 18 are compatibility problems with custom modules, database schema changes, or missing dependencies. Some functionality or features are deprecated from Odoo 17 that might not work exactly as in Odoo 17 after the migration because the core system was updated. Check errors in the logs, make necessary modifications to your custom modules to be compatible with Odoo 18, and ensure all the required dependencies related to Python or JS are installed. Testing at each step will help you identify and fix the problem.

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wow

Hello,

The reason for such error could be that, the database still expects these modules exist (their records are in ir_module_module), But the actual source code for these modules doesn’t exist anymore in your repo or Odoo core. During upgrade, Odoo tries to check dependencies and can’t find those that fails to proceed.

How did that happened , following could be the cases:

- This could happen due to the module used to exist in your custom addons in v17 but was deleted/renamed before upgrading.

- The module was part of another dependency (e.g., website_*, crm_*, pos_*) that changed structure in v18.

- The module was referenced as a dependency (depends in __manifest__.py) of another module, but that dependency module was removed in v18.

- The module entries remain in ir_module_module table, even though the code is gone.

What you could still check:

Run the below query in the database of v17,

SELECT id, state name FROM ir_module_module where name::text in ('module_x', 'module_y');

If the modules exist in the db then ,if you get records you can safely mark them as uninstalled manually before restarting the upgrade, using the query below:

UPDATE ir_module_module SET state = 'uninstalled' WHERE id in (id_x, id_y);

Once updated, try again your upgrade.

Hope it helps