donem middlware

<?php
namespace App\Http\Middleware;
use Closure;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\URL;
use Illuminate\Support\Facades\Session;
class donem {
    public function __construct(){}
    public function handle(Request $request, Closure $next)
    {
        $donem = $request->segment(1);
        
        if( Session::get('donem') != null ){
            URL::defaults(['donem' => '/']);
            return $next($request);
        }
        
        if (in_array($donem, config('donemler'))) {
            config(['donem'=>$donem]);
            Session::put('donem', $donem);
            URL::defaults(['donem' => config('donem')]);
            return $next($request);
        }
        if (!in_array($donem, config('donemler'))) {
                $segments=$request->segments();
                $segments[]=2023;
                return redirect(implode('/', $segments));
        }
        

    }
}

donemcurrent(2. middlware) middlware

<?php
namespace App\Http\Middleware;
use Closure;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Session;
class donemcurrent {
    public function __construct(){}
    public function handle(Request $request, Closure $next)
    {
        if( Session::get('donem') == null ){
            $segments = $request->segments();
            $donem = 2023;
            $key = array_search($donem, $segments);
            if(isset($key)){
                unset($segments[$key]);
            }
            Session::put('donem', $donem);
            return redirect(implode('/', $segments));
        }else{
            return $next($request);
        }
    }
}

web.php route

 Route::prefix('{donem?}')->middleware(['donem','donemcurrent'])->group(function () { 
        Route::get('/', [App\Http\Controllers\front\indexController::class,'index'])->name('index');
        Route::get('/liste', [App\Http\Controllers\front\indexController::class,'index'])->name('index');
        Route::group(['namespace'=>'satis','prefix'=>'satis','as'=>'satis.'],function(){
            Route::get('/', [App\Http\Controllers\front\satis\indexController::class,'index'])->name('index');
            Route::post('/', [App\Http\Controllers\front\satis\indexController::class,'post'])->middleware('XSS')->name('post');
            Route::get('/liste', [App\Http\Controllers\front\satis\indexController::class,'list'])->name('list');
            Route::get('/siparis', [App\Http\Controllers\front\satis\orderController::class,'index'])->name('order');
            Route::get('/detay/{hayvan_id}', [App\Http\Controllers\front\satis\indexController::class,'detail'])->name('detail');
            Route::get('/siparis/liste', [App\Http\Controllers\front\satis\orderController::class,'list'])->name('orderList');
            Route::post('/siparis/ekle', [App\Http\Controllers\front\satis\orderController::class,'post'])->name('orderPost');
            Route::post('/siparis/onay', [App\Http\Controllers\front\satis\orderController::class,'orderCheck'])->name('orderCheck');
        });   
});

Bu Şekilde Link Yapısını istediğim gibi alabiliyorum ama sanırım donem prefixinden dolayı doğru route'a Bağlanamıyor site.com/satis şeklinde girdiğimde'de index sayfası açılıyor.