diff --git a/addons/mrp/views/mrp_workorder_views.xml b/addons/mrp/views/mrp_workorder_views.xml
index 68a30400e77..16d9ae58fd4 100644
--- a/addons/mrp/views/mrp_workorder_views.xml
+++ b/addons/mrp/views/mrp_workorder_views.xml
@@ -307,7 +307,7 @@
         <field name="name">mrp.production.work.order.calendar</field>
         <field name="model">mrp.workorder</field>
         <field name="arch" type="xml">
-            <calendar date_stop="date_planned_finished" date_start="date_planned_start" string="Operations" color="workcenter_id" event_limit="5">
+            <calendar date_stop="date_planned_finished" date_start="date_planned_start" string="Operations" color="workcenter_id" event_limit="5" delete="0">
                 <field name="workcenter_id" filters="1"/>
                 <field name="production_id"/>
                 <field name="state"/>
@@ -343,7 +343,7 @@
         <field name="name">mrp.production.work.order.gantt.production</field>
         <field name="model">mrp.workorder</field>
         <field name="arch" type="xml">
-            <gantt class="o_mrp_workorder_gantt" date_stop="date_planned_finished" date_start="date_planned_start" string="Operations" default_group_by="production_id" create="0"
+            <gantt class="o_mrp_workorder_gantt" date_stop="date_planned_finished" date_start="date_planned_start" string="Operations" default_group_by="production_id" create="0" delete="0"
                 progress="progress" plan="0"
                 decoration-danger="'text-danger' in json_popover"
                 decoration-success="state == 'done'"