query works, nothing happens - php

Question

Ok, I have changed the code to two different querys and cut the GET_$ID semicolon and place it like the isset POST variables.
Now I get two new errors:
Notice: Undefined index: edit in C:\wamp64\www\projekt\edit.php on line 20
"$ID = $_GET['edit']; "
Notice: Undefined variable: title in C:\wamp64\www\projekt\edit.php on line 23
"SET title='$title'" "ID = $ID"
So something is lost from the ID or POST.
I have dumped all the values so they exist, is there something wrong with the syntax?
if (isset($_POST['submit']))
{
// input array
if (isset($_POST['title'])
&& isset($_POST['director'])
&& isset($_POST['year'])
&& isset($_POST['genre'])
&& isset($_GET['edit']))
// filter txt input
$title = filter_input(INPUT_POST,'title',FILTER_SANITIZE_SPECIAL_CHARS);
$director = filter_input(INPUT_POST,'director',FILTER_SANITIZE_SPECIAL_CHARS);
$year = filter_input(INPUT_POST,'year',FILTER_SANITIZE_SPECIAL_CHARS);
$category = $_POST['genre'];
$ID = $_GET['edit'];
// Edit query
$sql = "UPDATE movies
SET title='$title' director='$director' year='$year'
WHERE ID='$ID'";
$insert = mysqli_insert_id($conn);
$insert = "UPDATE category
SET category='$category'
WHERE ID='$ID'";
if ($conn->query($sql) && $conn->query($insert) === TRUE) {
echo "<div class='receipt'>Record ".$ID." updated successfully<br>
<a href='index.php'>Gå tillbaka</a> </div>";
} else {
echo "Fel vid anslutning : " . $conn->error;
}
} $conn->close();