ACF Date Based wp_query

I’ve modified your existing code.Can you please try the code bellow:

$args = array (
    'post_type' => 'exhibitions',
    'meta_query'=> array(
        'relation'      => 'AND',
        array(
            'key'       => 'exhibition_status',
            'value'     => 'past',
        ),
        array(
            'key'       => 'end_date',
            'compare'   => 'EXISTS',
            'type'      => 'DATE'
        ), 
    ),
    'meta_key'    => 'end_date',
    'orderby'     => 'meta_value',
    'order'       => 'ASC',
    'post_status' => 'publish',
    'posts_per_page' => 10,
    'paged' => get_query_var( 'paged' ),
);