Pre-created post not showing up after enabling Polylang for a CPT

I have a custom post type, e.g. ‘Books’, that I created some posts for which are already published. However I forgot to enable Polylang for that post, so I went ahead and enabled the post type in Polylang. Once I enabled it, it shows I have 4 posts in my custom post type screen -> Published (4), but I can’t see the post. I have to create new posts.

How can I force default language on those posts so I can see to edit it?

Here is what I saw before when I had the same issue and when I clicked on the link in the message, the post showed up: https://polylang.pro/wp-content/uploads/2015/11/assign-default-language-1-2.png

Thanks