Duplicate invoice ID detected - Paypal Standard module

[SGA]

Hi there, I'm new here. I hope someone can help me.

 

I have installed the Paypal Standard Module (this one: https://addons.prestashop.com/en/payment-card-wallet/22786-paypal-standard.html)

 

and the following message appears when I try to place an order (in both, live and sandbox modes)

 

 

I bought this module because I started to have problems with another paypal modules in the past weeks (not possible to pay at checkout, orders not appearing in backoffice, etc.) but with this new module the problems are still there so I am wondering if the problem comes from another place and not from the modules.