diff --git a/database/migrations/2018_10_27_055713_create_wiki_users.php b/database/migrations/2018_10_27_055713_create_wiki_users.php
index 85fd49548..c40616c24 100644
--- a/database/migrations/2018_10_27_055713_create_wiki_users.php
+++ b/database/migrations/2018_10_27_055713_create_wiki_users.php
@@ -20,7 +20,6 @@ class CreateWikiUsers extends Migration
             $table->string('name');
             $table->string('mail')->default('')->nullable();
             $table->primary('id');
-            $table->unique('id');
             $table->unique('login', 'user');
         });
     }