diff --git a/addons/crm/crm_lead.py b/addons/crm/crm_lead.py
index 703a389ba93..167a180b53e 100644
--- a/addons/crm/crm_lead.py
+++ b/addons/crm/crm_lead.py
@@ -597,11 +597,12 @@ class crm_lead(base_stage, osv.osv):
 
             self.convert_opportunity_send_note(cr, uid, lead, context=context)
             #TOCHECK: why need to change partner details in all messages of lead ?
-            if lead.partner_id:
-                msg_ids = [ x.id for x in lead.message_ids]
-                mail_message.write(cr, uid, msg_ids, {
-                        'partner_id': lead.partner_id.id
-                    }, context=context)
+            # TDE FIXME: I propose to delete this, makes no sense to update partner of an already-send email ...
+            # if lead.partner_id:
+            #     msg_ids = [x.id for x in lead.message_ids]
+            #     mail_message.write(cr, uid, msg_ids, {
+            #             'partner_id': lead.partner_id.id
+            #         }, context=context)
 
         if user_ids or section_id:
             self.allocate_salesman(cr, uid, ids, user_ids, section_id, context=context)