[IMP] Improve ospp_base and ospp_slide modules

addons/ospp_slide/models/models.py

@@ -179,6 +179,7 @@ class ChannelInstance(models.Model):
                 subtype_xmlid='website_slides.mt_channel_slide_published',
                 email_layout_xmlid='mail.mail_notification_light',
                 partner_ids=partner_ids,
+                notified_partner_ids=[],
                 **kwargs,
             )
             rec.is_notified = True