diff --git a/app/model/entity/User.php b/app/model/entity/User.php
index 67e1d3045..11c303a52 100644
--- a/app/model/entity/User.php
+++ b/app/model/entity/User.php
@@ -96,7 +96,7 @@ public function getName()
     protected $titlesAfterName;
 
     /**
-     * @ORM\Column(type="string")
+     * @ORM\Column(type="string", unique=true)
      */
     protected $email;
 
diff --git a/migrations/Version20250220202930.php b/migrations/Version20250220202930.php
new file mode 100644
index 000000000..2659aa67e
--- /dev/null
+++ b/migrations/Version20250220202930.php
@@ -0,0 +1,31 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Migrations;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+/**
+ * Auto-generated Migration: Please modify to your needs!
+ */
+final class Version20250220202930 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('CREATE UNIQUE INDEX UNIQ_8D93D649E7927C74 ON user (email)');
+    }
+
+    public function down(Schema $schema): void
+    {
+        // this down() migration is auto-generated, please modify it to your needs
+        $this->addSql('DROP INDEX UNIQ_8D93D649E7927C74 ON user');
+    }
+}