Füge eindeutigen Index zu parts.ipn wieder hinzu.

migrations/Version20251010125849.php

@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DoctrineMigrations;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+final class Version20251010125849 extends AbstractMigration
+{
+    public function getDescription(): string
+    {
+        return 'Add unique index to parts.ipn again';
+    }
+
+    public function up(Schema $schema): void
+    {
+        $this->addSql('CREATE UNIQUE INDEX UNIQ_6940A7FE3D721C14 ON parts (ipn)');
+    }
+
+    public function down(Schema $schema): void
+    {
+        $this->addSql('DROP INDEX UNIQ_6940A7FE3D721C14 ON `parts`');
+    }
+}