diff --git a/addons/website_theme_install/views/views.xml b/addons/website_theme_install/views/views.xml
index d53e1494570..258783a0489 100644
--- a/addons/website_theme_install/views/views.xml
+++ b/addons/website_theme_install/views/views.xml
@@ -86,6 +86,7 @@ action = {
     </record>
     <record id="theme_install_todo" model="ir.actions.todo">
         <field name="action_id" ref="theme_install_todo_action"/>
+        <field name="sequence">0</field>
     </record>
 
     <!-- Add link to theme install in default customize modal -->
diff --git a/odoo/addons/base/ir/ir_actions.py b/odoo/addons/base/ir/ir_actions.py
index e24ebedba1b..982a0364089 100644
--- a/odoo/addons/base/ir/ir_actions.py
+++ b/odoo/addons/base/ir/ir_actions.py
@@ -602,18 +602,19 @@ class IrActionsTodo(models.Model):
     def create(self, vals):
         todo = super(IrActionsTodo, self).create(vals)
         if todo.state == "open":
-            todo.ensure_one_open_todo()
+            self.ensure_one_open_todo()
         return todo
 
+    @api.multi
     def write(self, vals):
         res = super(IrActionsTodo, self).write(vals)
         if vals.get('state', '') == 'open':
-            for todo in self:
-                todo.ensure_one_open_todo()
+            self.ensure_one_open_todo()
         return res
 
+    @api.model
     def ensure_one_open_todo(self):
-        open_todo = self.search(['&', ('state', '=', 'open'), ('id', '!=', self.id)])
+        open_todo = self.search([('state', '=', 'open')], order='sequence asc, id desc', offset=1)
         if open_todo:
             open_todo.write({'state': 'done'})