SQLSTATE[42S22]: Column not found: 1054 Unknown column 'igtv' in 'field list'

Support and Discussion Database Server
1

On my website’s homepage, I want to change the descriptions of my services and add other services on the front page, in the website’s admin panel I have an option to change but when I change the text I get this error.

basicDB error: SQLSTATE[42S22]: Column not found: 1054 Unknown column ‘igtv’ in ‘field list’

My website is smmkeyfi.com I want to add text in this part: https://resimyukle.xyz/i/xT1RCP

This is part of my website’s admin panel that allows you to edit the front page: https://resimyukle.xyz/i/PK14OC

P.S: This is a free script made and given away by some guy on a webmaster forum. I contacted the dev, he said he can’t offer me support because this is a free product, I looked at his profile and it seems like he is offering PHP support services as a freelancer. I bought this site with the script installed, the previous owner doesn’t have any coding experience.

I have zero coding skills/knowledge. I just mimicked the code that was used for other parts, as you can see.

This is the admin panel’s homepage editing part;

if (@@$_POST[‘birinciBaslik’] || @@$_POST[‘ikinciBaslik’] || @@$_POST[‘nelerYapiyoruz’]
|| @@$_POST[‘instagram’] || @@$_POST[‘igtv’] || @@$_POST[‘twitter’] || @@$_POST[‘facebook’]
|| @@$_POST[‘Youtube’] || @@$_POST[‘musteriMemnuniyeti’] || @@$_POST[‘guvenliOdeme’]
|| @@$_POST[‘destek’] || @@$_POST[‘esnekHarcama’] || @@$_POST[‘akilliFiyatlandirma’]
|| @@$_POST[‘apiDestegi’]) {

$birinciBaslik = strip_tags($_POST['birinciBaslik']);
$ikinciBaslik = strip_tags($_POST['ikinciBaslik']);
$nelerYapiyoruz = strip_tags($_POST['nelerYapiyoruz']);
$instagram = strip_tags($_POST['instagram']);
$igtv = strip_tags($_POST['igtv']);
$twitter = strip_tags($_POST['twitter']);
$facebook = strip_tags($_POST['facebook']);
$Youtube = strip_tags($_POST['Youtube']);
$musteriMemnuniyeti = strip_tags($_POST['musteriMemnuniyeti']);
$guvenliOdeme = strip_tags($_POST['guvenliOdeme']);
$destek = strip_tags($_POST['destek']);
$esnekHarcama = strip_tags($_POST['esnekHarcama']);
$akilliFiyatlandirma = strip_tags($_POST['akilliFiyatlandirma']);
$apiDestegi = strip_tags($_POST['apiDestegi']);


$say = $db->from('anasayfaayar')
    ->all();

if (count($say) < 1) {
    $query = $db->insert('anasayfaayar')
        ->set(array(
            "birinciBaslik" => $birinciBaslik,
            "ikinciBaslik" => $ikinciBaslik,
            "nelerYapiyoruz" => $nelerYapiyoruz,
            "instagram" => $instagram,
            "igtv" => $igtv,
            "twitter" => $twitter,
            "facebook" => $facebook,
            "Youtube" => $Youtube,
            "musteriMemnuniyeti" =>$musteriMemnuniyeti,
            "guvenliOdeme" => $guvenliOdeme,
            "destek" => $destek,
            "esnekHarcama" => $esnekHarcama,
            "akilliFiyatlandirma" => $akilliFiyatlandirma,
            "apiDestegi" => $apiDestegi
        ));
    if ($query) {
        include "admin/siteanasayfa.php";
        Yonlendir("siteanasayfa.php");
    } else {
        include "admin/siteanasayfa.php";
        echo '<script type = "text/javascript"> swal("Bilgi", "Ekleme İşlemi Yapılamadı!.", "error"); </script>';
        Yonlendir("siteanasayfa", 2);
    }
} else {
    $update = $db->update('anasayfaayar')
        ->set([
            'birinciBaslik' => $birinciBaslik,
            'ikinciBaslik' => $ikinciBaslik,
            'nelerYapiyoruz' => $nelerYapiyoruz,
            'instagram' => $instagram,
            'igtv' => $igtv,
            'facebook' => $facebook,
            'twitter' => $twitter,
            'Youtube' => $Youtube,
            'musteriMemnuniyeti' => $musteriMemnuniyeti,
            'guvenliOdeme' => $guvenliOdeme,
            'destek' => $destek,
            'esnekHarcama' => $esnekHarcama,
            'akilliFiyatlandirma' => $akilliFiyatlandirma,
            'apiDestegi' => $apiDestegi
        ]);
    if ($update) {
        include "admin/siteanasayfa.php";
        Yonlendir("siteanasayfa.php");
    } else {
        include "admin/siteanasayfa.php";
        echo '<script type = "text/javascript"> swal("Bilgi", "Güncelleme İşlemi Yapılamadı.", "info"); </script>';
        Yonlendir("siteanasayfa", 2);
    }
}

};
I expected it to run smoothly. Instead, I got this error :

basicDB error: SQLSTATE[42S22]: Column not found: 1054 Unknown column ‘igtv’ in ‘field list’

then 404 error page