Additional pages index by Google

Hi there,

I’m using your plugin on a website. Google search console show 4x mora pages are indexed (we have for 4 currency). New pages are not created, but each page has this part in URL /?wmc-currency=EUR for each currency. It is bad for our SEO.

Is there any way to resolve this? To remove this part from URL: /?wmc-currency=EUR

Thank you for your time,
Nikola.