Products - Online Shop (Automatically Duplicating Product Description)


I am writing a description for each of the product (I kind of did my own template) but the same product description now applies to all of the products and if I amend (change the text) it updates ALL products again.

Can someone explain me why is it happening and how can I change it please?

Here is my site Read-Only:

Here is my site Read-Only: LINK
(how to share your site Read-Only link)