Does one exist?

So far I've got 5 sets but adding a 6th and it won't display

fields:
    description:
        display: SEO Description
        type: text
    intro:
        display: Introduction
        type: text
    header_img:
        type: file
        allowed: [png, gif, jpg, jpeg]
        destination: assets/img/blog
    magic_content:
        display: The Holy Grail
        type: replicator
        sets:

            content_set:
                display: Content
                fields:
                    text:
                        type: markitup

            image_set:
                display: Image
                fields:
                    image:
                        display: Image
                        type: file
                        allowed: [png, gif, jpg, jpeg]
                        destination: assets/img/blog
                    position:
                        display: Image position
                        type: select
                        options:
                            left: Left
                            right: Right
                            center: Centre

            gallery_set:
                display: Gallery
                fields:
                    text:
                        type: grid
                        fields:
                            caption:
                                display: Caption
                                type: text
                                width: 25%
                            image:
                                display: Image
                                type: file
                                allowed: [png, gif, jpg, jpeg]
                                destination: assets/img/blog

            audio_set:
                display: Audio player
                fields:
                    text:
                        type: grid
                        fields:
                            track_name:
                                display: Track name
                                type: text
                                width: 25%
                            track_file:
                                display: Audio file
                                type: file
                                allowed: [png, gif, jpg, jpeg]
                                destination: assets/img/blog
                            track_url:
                                display: Audio url
                                type: text

            quote_set:
        display: Quotation
        fields:
          quote:
            type: textarea
            height: 40
            instructions: What was said?
          cite:
            type: text
            instructions: Who said it?
          position:
            type: select
            options:
                left: Left
                right: Right
                center: Centre

      video_set:
        display: Video
                fields:
                    video:
                        type: text

Any suggestions?

Answered by Jason Varga! Go to answer.