Footer menu displays wrong menu

Hi there!

I’m trying to add a custom menu to my footer by adding a widget to the footer 1-4 sections. A menu does display, but it is not the right one (the primary menu shows up).

For your information:

I registered a menu with the following code:

function register_my_menus() {
  register_nav_menus(
    array(
      'footer-menu' => __( 'Footer menu' ),
    )
  );
}
add_action( 'init', 'register_my_menus' );

Thereafter I created a new menu through appearance > menu’s , selected my menu location en saved it. Then I created the custom menu widget in the footer and selected the menu. To check if it showed up without using the widget I pasted this code in my childtheme’s footer.php:

<?php wp_nav_menu( array( 'theme_location' => 'footer-menu' ) ); ?>

But that still doesn’t do the trick. What am I overlooking?

Hope you can help!

Kind regards Eline