custom url structure for posts

This is my blog page
mysite.com/blog

Here is a basic blog post
mysite.com/my-post

Here is a post with my custom post type
mysite.com/custom-post-type-/my-post

I went into permalink settings and changes the custom structure to be /blog/%postname%/. So now I get:
mysite.com/blog/my-post

Cool. But now my post in my custom post type is
mysite.com/blog/custom-post-type-/my-post

I have several custom post types and Im happy with their default:
mysite.com/custom-post-type-/my-post

But I do not want blog in my url:
mysite.com/blog/custom-post-type-/my-post

How can i edit ONLY the default wordpress post type structure url to only include the /blog/ prefix

If I can’t do that, then how can I edit all of my custom post types to not use the /blog/ that I placed in my permalink settings?