Random numbers at the end of URLs (duplicate content)

Are you using WooCommerce with geo-tracking?

No I don’t use it.
Thanks

Please provide a link to your site! Thanks.

Ok https://bit.ly/2dD43Tk

I don’t see any numbers at the ends of the URLs for your posts.

I’ve seen them into my Google Search Console.
There are many post with Meta Description Duplicates.
These post are like in the example:

https://www.mywebsite.com/urlpost/
https://www.mywebsite.com/urlpost/09239394
https://www.mywebsite.com/urlpost/87364563

You can try to take one post and paste it on google. You’ll find them duplicated.

Please attempt to disable all plugins, and use one of the default (Twenty*) themes. If the problem goes away, enable them one by one to identify the source of your troubles.