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Home › Forums › Backend Issues (wp-admin) › Check if value already exist 2 › Reply To: Check if value already exist 2

  • It’s a syntax error from a typo, I think it’s here,remove the extra ) in the second line you posted.

    
add_filter('acf/load_value/name=hidden_post_id', 'add_post_id_as_value', 10, 3);