Relation Manager Resource with pivot - Custom Attach

->headerActions([
                AttachAction::make()->label('Agregar')
                ->form(fn (AttachAction $action): array => [
                    //$action->getRecordSelect(),
                    
                    Forms\Components\Select::make('product_id')
                        ->relationship('product','external_name')
                        ->afterStateUpdated(fn (callable $set) => $set ('start',null))
                        ->reactive()
                        ->searchable()->required(),
                    Forms\Components\Select::make('start')
                        ->options(function (callable $get){
                                            
                            $product = Product::find($get('product_id'));
                            if (!$product)
                            {
                                return [];
                            }
                            return $product->performances()->pluck('start','id');
                        })->required()
                        
                ]),
            ])

Undefined array key "recordId"

 Relation Manager Resource with pivot - Custome Attach