diff --git a/addons/website_slides/models/slide_slide.py b/addons/website_slides/models/slide_slide.py
index 889cc58bf4d..00bd90ea7bc 100644
--- a/addons/website_slides/models/slide_slide.py
+++ b/addons/website_slides/models/slide_slide.py
@@ -632,6 +632,7 @@ class Slide(models.Model):
         ])
         if quiz_attempts_inc and existing_sudo:
             sql.increment_field_skiplock(existing_sudo, 'quiz_attempts_count')
+            SlidePartnerSudo.invalidate_cache(fnames=['quiz_attempts_count'], ids=existing_sudo.ids)
 
         new_slides = self_sudo - existing_sudo.mapped('slide_id')
         return SlidePartnerSudo.create([{