Why do I get errors, missing data, or broken modules after upgrading from Odoo 17 to Odoo 18?
These issues usually happen when custom modules, old workflows, or database tables don’t match Odoo 18’s new structure. During an Odoo 17 migration, some models change names or fields, and that causes conflicts. A clean Odoo 18 setup needs updated modules, correct data mapping, and proper testing. Fixing mismatched fields and updating custom code usually solves crashes, missing records, and workflow breaks.