Hi,

Check the Odoo.sh build logs to find the first traceback or error showing which custom module fails to load.

In the failing module’s __manifest__.py, set 'installable': False temporarily so the database can start.

Review that module’s code for v17 changes such as new manifest fields, renamed assets, or removed fields and APIs.

Fix the issues and test the module locally using a v17 Odoo source before pushing to Odoo.sh.

Once the module works without errors, change 'installable': True again and rebuild on Odoo.sh.

Repeat the same process for other custom modules until all load successfully without needing deletion.

Hope it helps.