Bugfixes

database/migrations/2026_02_14_140010_create_events.php

@@ -42,7 +42,7 @@ return new class extends Migration {
             $table->foreignId('cost_unit_id')->nullable()->constrained('cost_units', 'id')->restrictOnDelete()->cascadeOnUpdate();
 
             $table->string('name');
-            $table->string('identifier');
+            $table->string('identifier')->unique();
             $table->string('location');
             $table->string('postal_code');
             $table->string('email');

database/migrations/2026_02_15_140010_create_event_particpants.php

@@ -22,7 +22,7 @@ return new class extends Migration {
 
             $table->foreignId('event_id')->constrained('events', 'id')->cascadeOnDelete()->cascadeOnUpdate();
             $table->foreignId('user_id')->nullable()->constrained('users', 'id')->cascadeOnDelete()->cascadeOnUpdate();
-            $table->string('identifier');
+            $table->string('identifier')->unique();
             $table->string('firstname');
             $table->string('lastname');
             $table->string('nickname')->nullable();