How to check selected option in selector of action ?

In laravel 10 / filamentphp 3 app I have an action where in disabled TextInput I show current department and selector with Department selection:

                  Action::make('Move To Department')
                       ->modalIcon(DepartmentHelper::getIcon())
                       ->modalIconColor('success')
                       ->form([
                           TextInput::make('FromDepartmentId')
                               ->afterStateHydrated(function (TextInput $component, $state) {
                                   $employeeModel = $component->getModelInstance();
                                   if ( ! empty($employeeModel->department)) {
                                       $component->state($employeeModel->department->name);
                                   }
                               })->disabled()
                               ->label('From department'),

                           Select::make('move_to_department_id')->label('Move to department')
                               ->prefixIcon(DepartmentHelper::getIcon())
                               ->default(fn(Employee $employee): int => $employee->department_id)
                               ->preload()
                               ->options(Department::query()->getByBranchId(Filament::getTenant()->getAttribute('id'))->pluck('name',
                                   'id'))
                               ->required(),
                           TextInput::make('move_to_notes')
                               ->required()
                               ->maxLength(500),
                       ])

In which way can I to check that another department is selected?

I tried to use $data of the action :

                        ->action(function (Employee $employee, array $data, array $arguments): void {
                            // Checking data before making
                            if ($employee->department_id === $data['move_to_department_id']) {
                                Notification::make()
                                    ->title('Can not move employee to the same department !')
                                    ->warning()
                                    ->send();

                                return;
                            };

                            // Destination department is selected
                            if ( ! empty($data['move_to_department_id'])) {
                                try {
                                    Employee::whereId($employee->id)->update([
                                        'department_id' => $data['move_to_department_id'],
                                        'notes' => $employee->notes . '<br> >>>>>> ' . $data['move_to_notes'] . ' on ' .
                                                   DateConv::getFormattedDateTime(Carbon::now(config('app.timezone')),
                                                       DatetimeOutputFormat::AS_TEXT),
                                        'updated_at' => Carbon::now(config('app.timezone'))
                                    ]);
                                    Notification::make()
                                        ->title("Employee's card !")
                                        ->body("Employee was moved to selected department !")
                                        ->success()
                                        ->send();
                                    \Log::info(varDump($data, ' -1 $data::'));
                                } catch (Exception $e) {
                                    \Log::info($e->getMessage());
                                }
                            }
                        })
                        ->slideOver()

But in this way in case of error modal dialog is closed at first and next error notification is show. I need to leave modal dialog opened and error message inside of modal dialog form (just like as Required works - standart form error).