Duplicate form problem | WordPress.org

Hello,
I have a problem with your plugin. When I want to add options to my product, the add field is duplicated and impossible to deactivate.

I’ve tried looking in the source code of my page to no avail. It tells me that a Yith or wocommerce module has been activated but I can’t solve the problem.

I need your expertise please.
Can you help me?

Thanks in advance

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