Having strange problem changing Boolean in Laravel

So having this strange problem in laravel. I am trying to update a boolean value in my database but i keep getting this strange error in my log:

Missing required parameter for [Route: change.stock] [URI: product/stock/{product}/{turn}] [Missing parameter: turn]

Anybody maybe knows what i am over seeing here.

My route:

Route::get('/product/stock/{product}/{turn}', [ProductController::class, 'changeStock'])->name('change.stock');

My Controller:

  <?php
    
    namespace App\Http\Controllers;
    
    use Illuminate\Http\Request;
    use Illuminate\Support\Facades\Gate;
    use App\Http\Requests\Product\{ImageRequest,OfferRequest,DeliveryRequest,InformationsRequest};
    use App\Models\{Product,Image,Offer,Delivery,Category,Favorite};
    use Illuminate\Support\Str;
    
    class ProductController extends Controller
    {

    /**
     * Change product stock setting
     *
     * @param $switch
     * @return \Illuminate\Http\RedirectResponse
     *
     */
    public function changeStock($switch): \Illuminate\Http\RedirectResponse
    {
        try{
            $this -> setStock($switch);
            session() -> flash('success', 'You have changed your product stock setting');
        }
        catch (RequestException $e){
            session() -> flash('errormessage', $e -> getMessage());
        }
        return redirect() -> back();

    }

    /**
     * Sets the product stock status
     *
     * @param $switch
     * @throws RequestException
     */
    public function setStock($switch)
    {
        // sets stock status of product
        $this -> in_stock = $switch == 1;
        $this -> product() -> in_stock -> save();


    }

The blade file:

      <div class="btn-group btn-group-sm w-100 my-1 mb-4" role="group" aria-label="Basic example">
                    <a href="{{ route('change.stock', 1) }}" class="btn @if 
                    ($product -> in_stock == 1)
                    btn-success btn-sm @else btn-outline-success btn-sm @endif">In Stock</a>
                    <a href="{{ route('change.stock', 0) }}" class="btn @if 
                    ($product -> in_stock == 0)
                    btn-danger btn-sm @else btn-outline-danger btn-sm @endif">Set Out of Stock</a>
                </div>

Router:

Route::get('/product/stock/{product}/{turn}', [ProductController::class, 'changeStock'])->name('change.stock');

Controller:

public function changeStock(Product $product, $turn): \Illuminate\Http\RedirectResponse
{
    try {
        $product->update(['in_stock' => $turn]);
        session()->flash('success', 'You have changed your product stock setting');
    } catch (RequestException $e) {
        session()->flash('errormessage', $e->getMessage());
    }
    
    return redirect()->back();
}

Using in blade:

{{ route('change.stock', [$product->id, 1])