diff --git a/database/migrations/2026_04_30_160235_create_sites_table.php b/database/migrations/2026_04_30_160235_create_sites_table.php
index 9c448b6..64036cf 100644
--- a/database/migrations/2026_04_30_160235_create_sites_table.php
+++ b/database/migrations/2026_04_30_160235_create_sites_table.php
@@ -19,7 +19,7 @@ return new class extends Migration
             $table->string('url_re7')->unique()->nullable()->comment('Re7 url of the site.');
             $table->string('url_prod')->unique()->nullable()->comment('Prod url of the site.');
             $table->foreignId('project_manager_id')->nullable()->comment('Project manager associated.')
-                ->constrained('users')->onUpdate('restrict')->onDelete('restrict');
+                ->constrained('users')->onUpdate('restrict')->onDelete('set null');
             $table->foreignId('gitlab_project_id')->unique()->comment('Gitlab id of the gitlab project.')
                 ->constrained('gitlab_projects')->onUpdate('restrict')->onDelete('restrict');
             $table->timestamp('created_at')->nullable()->comment('Date the site was created.');