Hi Maxwell,

The error you're encountering:

TypeError: 'bool' object does not support the context manager protocol

is due to the incorrect use of a with statement on a boolean value. This occurs specifically at the following line in the Odoo core:

with self._check_balanced(container):

Odoo expects _check_balanced() to return a context manager, but your custom code appears to return a boolean (True or False) instead.

Solution

You should review your custom override of _check_balanced() in the AccountMove model, likely located in:

• Mtts/invoice_cost_price/models/invoice_cost_price.py, or
• Mtts/analytic_account_policy/models/account_account.py

If your method looks like this:

def _check_balanced(self, container):
    return True  # Incorrect

Replace it with the correct context manager format:

from contextlib import contextmanager
@contextmanager
def _check_balanced(self, container):
    yield

Or, if you have no special logic to implement, delegate back to Odoo's original method:

def _check_balanced(self, container):
    return super()._check_balanced(container)

Next Steps

• Search all custom modules for _check_balanced overrides.
• Fix the return type to ensure it is a proper context manager.
• Restart the server and test the confirmation action again.

This change should resolve the TypeError and restore functionality across modules that rely on this method, including stock and accounting.