diff --git a/addons/sale_crm/wizard/crm_opportunity_to_quotation.py b/addons/sale_crm/wizard/crm_opportunity_to_quotation.py
index 5bb95af10b7..de85076251f 100644
--- a/addons/sale_crm/wizard/crm_opportunity_to_quotation.py
+++ b/addons/sale_crm/wizard/crm_opportunity_to_quotation.py
@@ -32,10 +32,11 @@ class Opportunity2Quotation(models.TransientModel):
             the freshly created opportunity view.
         """
         self.ensure_one()
-        self.lead_id.write({
-            'partner_id': self.partner_id.id if self.action == 'exist' else self._create_partner()
-        })
-        self.lead_id._onchange_partner_id()
+        if self.action != 'nothing':
+            self.lead_id.write({
+                'partner_id': self.partner_id.id if self.action == 'exist' else self._create_partner()
+            })
+            self.lead_id._onchange_partner_id()
         return self.lead_id.action_new_quotation()
 
     def _create_partner(self):