diff --git a/migrations/Version20260708081610.php b/migrations/Version20260708081610.php
new file mode 100644
index 0000000..f37f050
--- /dev/null
+++ b/migrations/Version20260708081610.php
@@ -0,0 +1,36 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DoctrineMigrations;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+/**
+ * Auto-generated Migration: Please modify to your needs!
+ */
+final class Version20260708081610 extends AbstractMigration
+{
+    public function getDescription(): string
+    {
+        return '';
+    }
+
+    public function up(Schema $schema): void
+    {
+        // this up() migration is auto-generated, please modify it to your needs
+        $this->addSql('DROP INDEX unique_quartal');
+        $this->addSql('ALTER TABLE contacts ALTER ambulance TYPE VARCHAR(100)');
+        $this->addSql('CREATE UNIQUE INDEX unique_quartal ON contacts (phone_number, due_quartal) WHERE due_quartal IS NOT NULL');
+    }
+
+    public function down(Schema $schema): void
+    {
+        // this down() migration is auto-generated, please modify it to your needs
+        $this->addSql('CREATE SCHEMA public');
+        $this->addSql('DROP INDEX unique_quartal');
+        $this->addSql('ALTER TABLE contacts ALTER ambulance TYPE VARCHAR(50)');
+        $this->addSql('CREATE UNIQUE INDEX unique_quartal ON contacts (phone_number, due_quartal) WHERE (due_quartal IS NOT NULL)');
+    }
+}