diff --git a/content/developer/tutorials/getting_started/04_basicmodel.rst b/content/developer/tutorials/getting_started/04_basicmodel.rst
index 27200d49b..8cc936abe 100644
--- a/content/developer/tutorials/getting_started/04_basicmodel.rst
+++ b/content/developer/tutorials/getting_started/04_basicmodel.rst
@@ -249,6 +249,9 @@ Some attributes are available on all fields, here are the most common ones:
 :attr:`~odoo.fields.Field.required` (``bool``, default: ``False``)
     If ``True``, the field can not be empty. It must either have a default
     value or always be given a value when creating a record.
+..note::
+   For existing records, a boolean field defaulting to False signifies a null boolean state.
+   So sql constraints needs to use `is not True` instead of `is False`.
 :attr:`~odoo.fields.Field.help` (``str``, default: ``''``)
     Provides long-form help tooltip for users in the UI.
 :attr:`~odoo.fields.Field.index` (``bool``, default: ``False``)