"Main" link on menu point to template blog site


I have a blog template where in the menu there is:

1. Main Page Link

2. Page

3 . cpt-archive

4. page

When creating a new blog I get menu:

1. Main Page Link –> Points to the template blog

2. Page — OK

3 . cpt-archive –> Points to the template cpt-archive link

4. page — OK

What to do?