Help Needed with DateTimePicker in Repeater

public static function form(Form $form): Form
{
    return $form->schema([
        Grid::make(3)->schema([
            TextInput::make('name')->required()->label('Name'),
            Select::make('contact_id')->required()->searchable()
                ->options(function () {
                    return User::role('ContactPerson')->pluck('name', 'id');
                }),
            DateTimePicker::make('start_time')->required()->prefixIcon('heroicon-m-clock')->format('Y-m-d H:i')->seconds(false),
            Textarea::make('description')->columnSpan(3)->nullable(),

            Section::make()->schema([
                Repeater::make('taskGroups')->relationship('taskGroups')->schema([
                    Grid::make(6)->schema([
                        Select::make('worker_id')->columnSpan(1)->relationship('worker', 'name'),
                        
                        DateTimePicker::make('start_time')
                        ->format('Y-m-d H:i')
                        ->default(function (callable $get) {
                            return $get('../../start_time');
                        })->reactive(),
                    ]),
                ])->columns(1)->deletable(false)->addable(false)->minItems(0)->defaultItems(1)->label('')
            ]),
        ]),
    ]);
}