Googlebot crawling urls I do not have on website

Hello,

I have 500+ urls with redirect according to my Google Console. I have not set up these redirects, nor I know where the end slug comes from?

My original url slug (a tag page with pagination):

mydomain.com/original-slug/

Google identified url slug with redirect (500+ urls identified like this below):

mydomain.com/original-slug/page/1/

If you click on: mydomain.com/original-slug/page/1/
It redirects to:

mydomain.com/original-slug/

I would like to understand why is this phenomenon happening and what Google is expecting me to fix? I have not created these slugs nor I have set up any redirect. I just know is creating a mess on my Google console and Google is asking to validate fix. But what do I need to fix?

Thanks in advance!

S.