diff --git a/database/migrations/2014_10_12_000000_create_users_table.php b/database/migrations/2014_10_12_000000_create_users_table.php
index 094c026b..e2e3c824 100644
--- a/database/migrations/2014_10_12_000000_create_users_table.php
+++ b/database/migrations/2014_10_12_000000_create_users_table.php
@@ -34,7 +34,7 @@ public function up(): void
             $table->string('contact_name')->nullable();
             $table->string('contact_phone')->nullable();
             $table->integer('nb_children')->nullable();
-            $table->foreignId('parent_id')->nullable();
+            $table->foreignId('parent_id')->nullable()->constrained();
             $table->timestamps();
         });
     }