Last bugfixes

database/migrations/2026_02_15_140010_create_event_particpants.php

@@ -27,7 +27,7 @@ return new class extends Migration {
             $table->string('lastname');
             $table->string('nickname')->nullable();
             $table->string('participation_type');
-            $table->string('local_group');
+            $table->string('local_group')->nullable();
             $table->date('birthday');
             $table->string('address_1');
             $table->string('address_2')->nullable();