diff --git a/addons/website_slides/models/slide_slide.py b/addons/website_slides/models/slide_slide.py
index bbf0c122cb9..eb6d415f096 100644
--- a/addons/website_slides/models/slide_slide.py
+++ b/addons/website_slides/models/slide_slide.py
@@ -1340,7 +1340,7 @@ class Slide(models.Model):
         # If current slide is uncategorized and all the channel uncategorized slides are completed, return the first category
         if not self.category_id and all(self.channel_id.slide_ids.filtered(
             lambda s: not s.is_category and not s.category_id).mapped('user_has_completed')):
-            return channel_category_ids[0]
+            return self.env['slide.slide'].browse(channel_category_ids[0])
         # If current category is completed and current category is not the last one, get next category
         elif self.user_has_completed_category and self.category_id.id in channel_category_ids and self.category_id.id != channel_category_ids[-1]:
             index_current_category = channel_category_ids.index(self.category_id.id)