diff --git a/app/Filament/Resources/DeliveryCalendarOverrides/Schemas/DeliveryCalendarOverrideForm.php b/app/Filament/Resources/DeliveryCalendarOverrides/Schemas/DeliveryCalendarOverrideForm.php
index 8ffc373..cbd2aeb 100644
--- a/app/Filament/Resources/DeliveryCalendarOverrides/Schemas/DeliveryCalendarOverrideForm.php
+++ b/app/Filament/Resources/DeliveryCalendarOverrides/Schemas/DeliveryCalendarOverrideForm.php
@@ -18,9 +18,10 @@ public static function configure(Schema $schema): Schema
             ->components([
                 Select::make('supplier_id')
                     ->label('Beszállító')
-                    ->relationship('supplier', 'name')
+                    ->relationship('supplier', 'name', fn($query) => $query->where('hasDeliveryConstraint', true))
                     ->searchable()
-                    ->required(),
+                    ->required()
+                    ->live(),
                 Select::make('override_scope')
                     ->label('Felülbírálás szintje')
                     ->options(collect(OverrideScope::cases())->mapWithKeys(
@@ -37,7 +38,10 @@ public static function configure(Schema $schema): Schema
                     ->required(fn(Get $get) => $get('override_scope') === OverrideScope::Region->value),
                 Select::make('profit_center_id')
                     ->label('Profitcenter')
-                    ->relationship('profitCenter', 'name')
+                    ->relationship('profitCenter', 'name', fn($query, Get $get) => $query->when(
+                        $get('supplier_id'),
+                        fn($q, $supplierId) => $q->whereHas('suppliers', fn($s) => $s->where('suppliers.id', $supplierId))
+                    ))
                     ->searchable()
                     ->visible(fn(Get $get) => $get('override_scope') === OverrideScope::ProfitCenter->value)
                     ->required(fn(Get $get) => $get('override_scope') === OverrideScope::ProfitCenter->value),