favorite item issue

Hello,
i have a problem, i see a notification in the favorites that there is an item there but when i go to my favorites its empty , i tried adding other products and it works fine so i think its a deleted product that is still there , how can remove it from the notifications and if my client customers had this issue what should he do?
Best Regards,
Mayada Ashraf

The page I need help with: [log in to see the link]