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pagination 404 error, same slug home and categories

I would like to change the permalink for categories. I configured thé prefix of categories with actions
I have a page for the home page wich have a slug actions
All the website worked correctly.
URL of home www.mywebsite.com/actions
URL of the first category is

www.mywebsite.com/actions/first-slug

The pagination work for all categories :
URL is www.mywebsite.com/actions/first-slug/page/2

But the home page have a problem with the pagination
URL of page 2 with all posts is : www.mywebsite.com/actions/page/2
I have an error 404. It’s normal because the category page not existe…

How to have the same slug for the home page and the slug of categories without an 404 error for the pagination to the home page?

Thanks a lot