diff --git a/user_guide_src/source/models/entities.rst b/user_guide_src/source/models/entities.rst
index a1941fb31d97..d2c99c8623b6 100644
--- a/user_guide_src/source/models/entities.rst
+++ b/user_guide_src/source/models/entities.rst
@@ -31,6 +31,8 @@ Assume you have a database table named ``users`` that has the following schema::
     password    - string
     created_at  - datetime
 
+.. important:: ``attributes`` is a reserved word for internal use. If you use it as a column name, the Entity does not work correctly.
+
 Create the Entity Class
 -----------------------