meta_query compare='!=' with multiple custom fields

Hi everyone,

a post has the following custom fields:

'my_custom_field' => 1
'my_custom_field' => 2
'my_custom_field' => 3

I now want to query all posts that do NOT contain the value 2 for ‘my_custom_field’. I’m trying this:

$args = Array('posts_per_page' => -1,
    'post_type' => 'page',
    'meta_query' => array(
      array(
        'key' => 'my_custom_field',
        'value' => 2,
        'compare' => '!='
      )
    )
  );

However, this is still returning my sample post, as my sample post has a field of ‘my_custom_field’ with a value other than 2 (1 and 3). I somehow need to change my query to say “Exclude posts that have at least one field of ‘my_custom_field’ with the value of 2”.

Can anyone help me? Thanks!