Filament Action: Select field shows ID instead of name when filling form

Action::make('Edit Section')
  ->modalWidth('md')
  ->fillForm(fn(Section $record) => [
        'name' => $record->name,
        'instructor_id' => $record->instructor_id,
        'course_id' => $record->course_
])
  ->schema([
  Select::make('instructor_id')
         ->label('Instructor')
         ->relationship(
              'instructor',
              modifyQueryUsing: fn($query) => $query->whereInstructorDepartment(auth()->user()->instructor-        >department_id))
          ->getOptionLabelFromRecordUsing(fn($record) => $record->full_name)
          ->searchable()
          ->preload()
          ->required(),
  Select::make('course_id')
      ->label('Course')
      ->options(
          fn() => Course::whereDepartment(auth()->user()->instructor->department_id)
              ->pluck('code', 'id')
              ->toArray()
      )
       ->searchable()
        ->preload()
        ->required(),
])
      ->action(function (array $data, Section $record) {
          $record->update($data);
          Notification::make()
->title('Section updated successfully')
->success()
->send();
})