ACF Problem

Hi, i have a custom field created with the ACF Pro (5.5.11) named “book”, and a page created with visualcomposer named “book”. When activate Permalink, the slug “mydomain.com/book” now show the single.php with the frontpage of the editor of ACF “book”, and the page of visualcomposer not show.
In permalink can see that show a URI duplicate, these two pages, the frontpage Editor of ACF “book” with slug “https://mydomain.com/wp-admin/post.php?post=5792&action=edit” its the page that now show at “mydomain.com/book”. Although change the slug page, the content it’s the same.
If I deactivate the plugin, everything works again.
Any solution?
Thanks!