diff --git a/yaltik_crm_action/__manifest__.py b/yaltik_crm_action/__manifest__.py
index 0430c8b..414c464 100644
--- a/yaltik_crm_action/__manifest__.py
+++ b/yaltik_crm_action/__manifest__.py
@@ -18,7 +18,7 @@
 {
     'name': 'CRM Actions',
     'summary': 'Action management, instead of new activity, in CRM',
-    'version': '10.0.1.3.4',
+    'version': '10.0.1.3.5',
     'category': 'Sales',
     'author': 'Fabien BOURGEOIS - Yaltik',
     'license': 'AGPL-3',
diff --git a/yaltik_crm_action/models/crm_action.py b/yaltik_crm_action/models/crm_action.py
index e3cb725..8dd0c0e 100644
--- a/yaltik_crm_action/models/crm_action.py
+++ b/yaltik_crm_action/models/crm_action.py
@@ -45,7 +45,8 @@ class CrmAction(models.Model):
     user_id = fields.Many2one('res.users', string='User', required=True,
                               default=lambda self: self.env.user)
     lead_id = fields.Many2one('crm.lead', string='Lead', ondelete='cascade')
-    event_id = fields.Many2one('calendar.event', 'Calendar event', ondelete='cascade')
+    event_id = fields.Many2one('calendar.event', 'Calendar event', ondelete='cascade',
+                               copy=False)
     action_type_id = fields.Many2one(
         'crm.action.type', string='Type', required=True,
         default=lambda self: self.env['crm.action.type'].search([], limit=1))