diff --git a/addons/website_sale_slides/models/slide_channel.py b/addons/website_sale_slides/models/slide_channel.py
index fd6ea6d1f37..37d158e0898 100644
--- a/addons/website_sale_slides/models/slide_channel.py
+++ b/addons/website_sale_slides/models/slide_channel.py
@@ -33,12 +33,11 @@ class Channel(models.Model):
         for channel in self:
             channel.product_sale_revenues = rg_data.get(channel.product_id.id, 0)
 
-    @api.model
-    def create(self, vals):
-        channel = super(Channel, self).create(vals)
-        if channel.enroll == 'payment':
-            channel._synchronize_product_publish()
-        return channel
+    @api.model_create_multi
+    def create(self, vals_list):
+        channels = super(Channel, self).create(vals_list)
+        channels.filtered(lambda channel: channel.enroll == 'payment')._synchronize_product_publish()
+        return channels
 
     def write(self, vals):
         res = super(Channel, self).write(vals)
@@ -47,6 +46,8 @@ class Channel(models.Model):
         return res
 
     def _synchronize_product_publish(self):
+        if not self:
+            return
         self.filtered(lambda channel: channel.is_published and not channel.product_id.is_published).sudo().product_id.write({'is_published': True})
         self.filtered(lambda channel: not channel.is_published and channel.product_id.is_published).sudo().product_id.write({'is_published': False})
 
diff --git a/addons/website_slides/models/res_users.py b/addons/website_slides/models/res_users.py
index 47f6baa980e..3b72ba7ef0e 100644
--- a/addons/website_slides/models/res_users.py
+++ b/addons/website_slides/models/res_users.py
@@ -7,12 +7,15 @@ from odoo import api, models
 class Users(models.Model):
     _inherit = 'res.users'
 
-    @api.model
-    def create(self, values):
+    @api.model_create_multi
+    def create(self, vals_list):
         """ Trigger automatic subscription based on user groups """
-        user = super(Users, self).create(values)
-        self.env['slide.channel'].sudo().search([('enroll_group_ids', 'in', user.groups_id.ids)])._action_add_members(user.partner_id)
-        return user
+        users = super(Users, self).create(vals_list)
+        for user in users:
+            self.env['slide.channel'].sudo().search([
+                ('enroll_group_ids', 'in', user.groups_id.ids)
+            ])._action_add_members(user.partner_id)
+        return users
 
     def write(self, vals):
         """ Trigger automatic subscription based on updated user groups """
diff --git a/addons/website_slides/models/slide_slide.py b/addons/website_slides/models/slide_slide.py
index 00bd90ea7bc..4a714e07052 100644
--- a/addons/website_slides/models/slide_slide.py
+++ b/addons/website_slides/models/slide_slide.py
@@ -35,8 +35,9 @@ class SlidePartnerRelation(models.Model):
     completed = fields.Boolean('Completed')
     quiz_attempts_count = fields.Integer('Quiz attempts count', default=0)
 
-    def create(self, values):
-        res = super(SlidePartnerRelation, self).create(values)
+    @api.model_create_multi
+    def create(self, vals_list):
+        res = super().create(vals_list)
         completed = res.filtered('completed')
         if completed:
             completed._set_completed_callback()
diff --git a/addons/website_slides_forum/models/slide_channel.py b/addons/website_slides_forum/models/slide_channel.py
index c45dc14c0d8..e59272e7a52 100644
--- a/addons/website_slides_forum/models/slide_channel.py
+++ b/addons/website_slides_forum/models/slide_channel.py
@@ -25,12 +25,11 @@ class Channel(models.Model):
 
         return action
 
-    @api.model
-    def create(self, vals):
-        channel = super(Channel, self.with_context(mail_create_nosubscribe=True)).create(vals)
-        if channel.forum_id:
-            channel.forum_id.privacy = False
-        return channel
+    @api.model_create_multi
+    def create(self, vals_list):
+        channels = super(Channel, self.with_context(mail_create_nosubscribe=True)).create(vals_list)
+        channels.forum_id.privacy = False
+        return channels
 
     def write(self, vals):
         old_forum = self.forum_id