not working meta query

gistfile1.txt

<?php 
$args = array(
    'post_type' => 'event',
     'order'   => 'ASC',

     
    'meta_query' => array(
	'key' => 'date ordering format - YYYY-MM-DD',
	'orderby' => 'meta_value',
	'relation' => 'AND',
        array(
            'key' => 'event category (events feed page)',
            'value' => 'Dinner Series',
            'compare' => 'EXISTS'
        ),
	array(
            'key' => 'Past Event',
            'value' => 'Past',
            'compare' => 'NOT EXISTS'
        ),
	'relation' => 'AND',
        array(
            'key' => 'Past Season',
            'value' => 'true',
            'compare' => 'NOT EXISTS'
        ),
        
	
    ),
);



$my_query2 = new WP_Query($args);
	if( $my_query2->have_posts() ) {
  
  while ($my_query2->have_posts()) : $my_query2->the_post(); 
		echo '<div class="fullWidthSeason">';
  	
		if (class_exists('MultiPostThumbnails')) :
    MultiPostThumbnails::the_post_thumbnail(
        get_post_type(), 'series-image', $post->ID, 'full',NULL, FALSE
    );
endif;
		echo '<div class="featuredBlockDate '.get_post_meta($post->ID, 'Series Page text left or right align', true).' '.get_post_meta($post->ID, 'Black Text', true).' '.get_post_meta($post->ID, 'Black Text', true).'">';
		echo get_post_meta($post->ID, 'H1 date (Series Page + Event Page description)', true); 
		echo '</div>';
		echo '<div class="featuredBlockTitle  '.get_post_meta($post->ID, 'Series Page text left or right align', true).' '.get_post_meta($post->ID, 'Black Text', true).'">';
		echo get_post_meta($post->ID, 'Season Page Title', true);
		echo '</div>';
		echo '<div class="featuredBlockExcerpt  '.get_post_meta($post->ID, 'Series Page text left or right align', true).' '.get_post_meta($post->ID, 'Black Text', true).'">';
		echo the_excerpt();
		echo '</div>';
		echo '<div class="moreButton  '.get_post_meta($post->ID, 'Series Page text left or right align', true).'">';
		echo '<div class="moreButtonSeason  '.get_post_meta($post->ID, 'Series Page text left or right align', true).'"><a href="'.get_post_meta($post->ID, 'featured/series button address', true).' " target="_blank">'.get_post_meta($post->ID, 'featured/series button text', true).'</a></div>'; 
		echo '</div>';
		echo '</div>';
		
	?>