diff --git a/addons/project/report/project_cumulative.xml b/addons/project/report/project_cumulative.xml
index c30c91fe6c0..17e059c8de7 100644
--- a/addons/project/report/project_cumulative.xml
+++ b/addons/project/report/project_cumulative.xml
@@ -6,7 +6,7 @@
             <field name="name">project.task.history.cumulative.tree</field>
             <field name="model">project.task.history.cumulative</field>
             <field name="arch" type="xml">
-                <tree string="Tasks's Cumulative Flow">
+                <tree string="Tasks's Cumulative Flow" create="false">
                     <field name="date"/>
                     <field name="project_id"/>
                     <field name="task_id"/>