Fix error on attempt to insert a duplicate series

app/views/collection/edit.php

@@ -14,13 +14,13 @@
 				<tr>
 					<td class="align-right"><label for="title">Title</label></td>
 					<td class="align-left">
-						<input type="text" name="title" value="<?= $item['title'] ?>" />
+						<input type="text" id="title" name="title" value="<?= $item['title'] ?>" />
 					</td>
 				</tr>
 				<tr>
-					<td class="align-right"><label for="title">Alternate Title</label></td>
+					<td class="align-right"><label for="alternate_title">Alternate Title</label></td>
 					<td class="align-left">
-						<input type="text" name="alternate_title" value="<?= $item['alternate_title'] ?>"/>
+						<input type="text" id="alternate_title" name="alternate_title" value="<?= $item['alternate_title'] ?>"/>
 					</td>
 				</tr>
 				<tr>
@@ -28,7 +28,7 @@
 					<td class="align-left">
 						<select name="media_id" id="media_id">
 						<?php foreach($media_items as $id => $name): ?>
-							<option <?= $item['media_id'] === $id ? 'selected="selected"' : '' ?> value="<?= $id ?>"><?= $name ?></option>
+							<option <?= $item['media_id'] === (string)$id ? 'selected="selected"' : '' ?> value="<?= $id ?>"><?= $name ?></option>
 						<?php endforeach ?>
 						</select>
 					</td>

src/Model/AnimeCollection.php

@@ -89,21 +89,6 @@ final class AnimeCollection extends Collection {
 		return $output;
 	}
 
-	/**
-	 * Get item from collection for editing
-	 *
-	 * @param string $id
-	 * @return array
-	 */
-	public function getCollectionEntry($id): array
-	{
-		$query = $this->db->from('anime_set')
-			->where('hummingbird_id', $id)
-			->get();
-
-		return $query->fetch(PDO::FETCH_ASSOC);
-	}
-
 	/**
 	 * Get full collection from the database
 	 *
@@ -151,7 +136,16 @@ final class AnimeCollection extends Collection {
 	 */
 	public function add($data): void
 	{
-		$anime = (object)$this->animeModel->getAnimeById($data['id']);
+		$id = $data['id'];
+
+		// Check that the anime doesn't already exist
+		$existing = $this->get($id);
+		if ($existing === FALSE)
+		{
+			return;
+		}
+
+		$anime = (object)$this->animeModel->getAnimeById($id);
 		$this->db->set([
 			'hummingbird_id' => $data['id'],
 			'slug' => $anime->slug,
@@ -216,9 +210,9 @@ final class AnimeCollection extends Collection {
 	 * Get the details of a collection item
 	 *
 	 * @param int $kitsuId
-	 * @return array
+	 * @return array | false
 	 */
-	public function get($kitsuId): array
+	public function get($kitsuId)
 	{
 		$query = $this->db->from('anime_set')
 			->where('hummingbird_id', $kitsuId)

src/Model/Collection.php

@@ -17,7 +17,6 @@
 namespace Aviat\AnimeClient\Model;
 
 use Aviat\Ion\Di\ContainerInterface;
-use PDO;
 use PDOException;
 
 /**