Sql код на добавление - MySQL

<?php
try{
     $n_id = $_POST['n_id'];
    $n_fio = $_POST['n_komp'];
    $n_otv = $_POST['n_otv'];
    $n_kom = $_POST['n_kom'];
    $n_otd = $_POST['n_otd'];
    $n_data = $_POST['n_data'];
    $n_pr = $_POST['n_pr'];
    
    $dbh=new PDO('mysql:host=localhost;dbname=otdel','user157','157266');
    $dbh->exec('SET CHARACTER SET utf8'):
    $stm = $dbh->prepare('INSERT INTO neispravnosti  n_komp=?, n_otv=?, n_kom=?, n_otd=?,n_data=?,n_pr=?  n_id=?');
    $stm->execute(array($n_fio, $n_otv, $n_kom,$n_otd,$n_data,$n_pr, $n_id));
}
catch(PDOException $e){
        echo 'Database error: '.$e->getMessage();
}
?>

('INSERT INTO neispravnosti  n_komp=?, n_otv=?, n_kom=?, n_otd=?,n_data=?,n_pr=?  n_id=?')