diff --git a/database/factories/DatacenterFactory.php b/database/factories/DatacenterFactory.php
index 0825956..74a1ab4 100644
--- a/database/factories/DatacenterFactory.php
+++ b/database/factories/DatacenterFactory.php
@@ -13,7 +13,8 @@ class DatacenterFactory extends Factory
     public function definition(): array
     {
         return [
-            'code' => $this->faker->unique()->lexify('dc?'),
+            // Wide unique space — 'dc?' (26 values) exhausted across a full suite run.
+            'code' => 'dc'.$this->faker->unique()->numberBetween(100, 999999),
             'name' => $this->faker->city(),
             'location' => 'DE',
             'active' => true,