[1.5.x] Removed a ModelForm doc section that doesn't apply to 1.5.x

made. See :ref:`Validating objects <validating-objects>` for more information

on the model's ``clean()`` hook.

Considerations regarding fields' ``error_messages``

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Error messages defined at the

:attr:`form field <django.forms.Field.error_messages>` level or at the

:ref:`form Meta <modelforms-overriding-default-fields>` level always take

precedence over the error messages defined at the

:attr:`model field <django.db.models.Field.error_messages>` level.

Error messages  defined on :attr:`model fields

<django.db.models.Field.error_messages>` are only used when the

``ValidationError`` is raised during the :ref:`model validation

<validating-objects>` step and no corresponding error messages are defined at

the form level.

The ``save()`` method

---------------------