SQLSTATE[HY093]: Invalid parameter number: number of bound variables does not match number of tokens

<?php
include './db.php';
$task_type = ['meeting' => 'Встреча','case' => 'Дело','call' => 'Звонок'];
$status = $_GET['status'] ?? 0;
//read
$sql = 'Select * from tasks';
$tasks = $tasks_object->query($sql);
$tasks->execute();
$tasks = $tasks->fetchAll();
if (isset($_GET['id'])){
    $task_id = $_GET['id'];
    foreach($tasks as $value){
        if($value['id'] == $task_id) $task = $value;
    }
}
 
 
//filter
$filtr_time = $_GET['time'] ?? false;
 
 
//create/update
$name = $_POST['name'] ?? 'Добавить тему';
$type = $_POST['task_type'] ?? null;
$location = $_POST['place'] ?? null;
$description = $_POST['description'] ?? null;
$duration = $_POST['duration'] ?? null;
$date = $_POST['date'] ?? null;
$time = $_POST['time'] ?? null;
 
 
if (!empty($_POST)){
    if (isset($_POST['add'])){
        $sql = ("Insert into tasks(`name`,`type`,`location`,`description`,`duration`,`date`) values(:name,:type,:location,:description,:duration,:date)");
    }elseif(isset($_POST['update'])) {
        $sql = ("Update  tasks set `name`=:name,`type`=:type,`location`=:location,`description`=:description,`duration`=:duration,`date`=:date where id=$task_id");
    }
    $query = $tasks_object->prepare($sql);
    $query->execute([
        ':name' => $name,
        ':type' => $type,
        ':location' => $location,
        ':description' => $description,
        ':duration' => $duration,
        ':date' => $date. ' ' .$time,
    ]);
//delete
    if (isset($_POST['delete'])){
        $query = $tasks_object->prepare("DELETE FROM `tasks` WHERE id=$task_id");
        $query->execute();
    }
    if (isset($_POST['succed'])){
        $query = $tasks_object->prepare("UPDATE `tasks` set status=1 where id=$task_id");
        $query->execute();
    }
    if ($query){
        header("Location: "."/calendar/index.php");
    }
}
 
?>

':date' => ($date. ' ' .$time),

$type = $_POST['task_type'] ?? 'Встреча';