diff --git a/addons/product/product_demo.xml b/addons/product/product_demo.xml
index 6676a79dfe6..66b86fc7b63 100644
--- a/addons/product/product_demo.xml
+++ b/addons/product/product_demo.xml
@@ -19,27 +19,27 @@
             <field name="name">Other Products</field>
         </record>
         <record id="product_category_4" model="product.category">
-            <field name="parent_id" ref="product_category_1"/>
+            <field name="parent_id" ref="product.product_category_1"/>
             <field name="name">Computers</field>
         </record>
         <record id="product_category_5" model="product.category">
-            <field name="parent_id" ref="product_category_1"/>
+            <field name="parent_id" ref="product.product_category_1"/>
             <field name="name">Services</field>
         </record>
         <record id="product_category_6" model="product.category">
-            <field name="parent_id" ref="product_category_1"/>
+            <field name="parent_id" ref="product.product_category_1"/>
             <field name="name">External Devices</field>
         </record>
         <record id="product_category_7" model="product.category">
-            <field name="parent_id" ref="product_category_1"/>
+            <field name="parent_id" ref="product.product_category_1"/>
             <field name="name">Accessories</field>
         </record>
         <record id="product_category_8" model="product.category">
-            <field name="parent_id" ref="product_category_1"/>
+            <field name="parent_id" ref="product.product_category_1"/>
             <field name="name">Components</field>
         </record>
         <record id="product_category_9" model="product.category">
-            <field name="parent_id" ref="product_category_1"/>
+            <field name="parent_id" ref="product.product_category_1"/>
             <field name="name">Softwares</field>
         </record>
         <record id="product_category_10" model="product.category">