diff --git a/addons/crm/wizard/crm_merge_opportunities.py b/addons/crm/wizard/crm_merge_opportunities.py
index 7307bd37554..4c95d7db4ad 100644
--- a/addons/crm/wizard/crm_merge_opportunities.py
+++ b/addons/crm/wizard/crm_merge_opportunities.py
@@ -28,7 +28,7 @@ class MergeOpportunity(models.TransientModel):
         if record_ids:
             if 'opportunity_ids' in fields:
                 opp_ids = self.env['crm.lead'].browse(record_ids).filtered(lambda opp: opp.probability < 100).ids
-                result['opportunity_ids'] = opp_ids
+                result['opportunity_ids'] = [(6, 0, opp_ids)]
 
         return result
 
diff --git a/addons/website_crm/models/crm_lead.py b/addons/website_crm/models/crm_lead.py
index 0ea63e3b4b1..9612c9995a4 100644
--- a/addons/website_crm/models/crm_lead.py
+++ b/addons/website_crm/models/crm_lead.py
@@ -12,17 +12,19 @@ class Lead(models.Model):
 
     @api.depends('visitor_ids.page_ids')
     def _compute_visitor_page_count(self):
-        self.flush(['visitor_ids'])
-        sql = """ SELECT l.id as lead_id, count(*) as page_view_count
-                    FROM crm_lead l
-                    JOIN crm_lead_website_visitor_rel lv ON l.id = lv.crm_lead_id
-                    JOIN website_visitor v ON v.id = lv.website_visitor_id
-                    JOIN website_track p ON p.visitor_id = v.id
-                    WHERE l.id in %s
-                    GROUP BY l.id"""
-        self.env.cr.execute(sql, (tuple(self.ids),))
-        page_data = self.env.cr.dictfetchall()
-        mapped_data = {data['lead_id']: data['page_view_count'] for data in page_data}
+        mapped_data = {}
+        if self.ids:
+            self.flush(['visitor_ids'])
+            sql = """ SELECT l.id as lead_id, count(*) as page_view_count
+                        FROM crm_lead l
+                        JOIN crm_lead_website_visitor_rel lv ON l.id = lv.crm_lead_id
+                        JOIN website_visitor v ON v.id = lv.website_visitor_id
+                        JOIN website_track p ON p.visitor_id = v.id
+                        WHERE l.id in %s
+                        GROUP BY l.id"""
+            self.env.cr.execute(sql, (tuple(self.ids),))
+            page_data = self.env.cr.dictfetchall()
+            mapped_data = {data['lead_id']: data['page_view_count'] for data in page_data}
         for lead in self:
             lead.visitor_page_count = mapped_data.get(lead.id, 0)