The POST method is not supported for this route. Supported methods: GET, HEAD.

I'm trying to save data into my database. The code works before and I think I didn't touch it at all but when I tried to save a data into my database again an error occurs where "The POST method is not supported for this route. Supported methods: GET, HEAD." below is the code of my form

                   <form id="contact" action="{{url('/reservation')}}" method="post" enctype="multipart/form-data">
                    @csrf
                      <div class="row">
                        <div class="col-lg-12">
                            <h4>RiceServation</h4>
                        </div>
                        <div class="col-lg-6 col-sm-12">
                          <fieldset>
                            <input class="form-design" name="name" type="text" id="name" placeholder="Your Name*" required="">
                          </fieldset>
                        </div>
                        <div class="col-lg-6 col-sm-12">
                          <fieldset>
                          <input class="form-design" name="email" type="text" id="email" pattern="[^ @]*@[^ @]*" placeholder="Your Email Address" required="">
                        </fieldset>
                        </div>
                        <div class="col-lg-6 col-sm-12">
                          <fieldset>
                            <input class="form-design" name="phone" type="number" id="phone" placeholder="Phone Number*" required="">
                          </fieldset>
                        </div>
                        <div class="col-md-6 col-sm-12">
                          
                        	<input class="form-design" type="text" name="address" placeholder="Address" required="">

                        </div>
                        <div class="col-lg-6">
                            <div id="filterDate2">    
                              <div class="input-group date" data-date-format="dd/mm/yyyy">
                                <input class="form-design" name="date" id="date" type="text" class="form-control" placeholder="dd/mm/yyyy" required="">
                                <div class="input-group-addon" >
                                  <span class="glyphicon glyphicon-th"></span>
                                </div>
                              </div>
                            </div>   
                        </div>
                        <div class="col-md-6 col-sm-12">
                          
                        	<input class="form-design" type="time" name="time" required="">

                        </div>

    <div class="row col-12">
    @foreach($data as $data)
            <div class="row sm-6 ml-4 mb-1" class="no-gutters" style="height:25px; width: auto;">
                <p class='text-dark mr-2'><input type="checkbox" name="prod_name[]" value="{{$data->title}}"/> {{$data->title}}</p>
                <p class='text-dark'>Qty:</p><input style="width:80px; height:25px;" type="number" name="prod_qty[{{$data->title}}]" min="1" value="1" class="form-control ml-2">
                <input type="hidden" name="product_fee[{{$data->title}}]" value="{{$data->price}}">
                <input type="hidden" name="prod_id[{{$data->title}}]" value="{{$data->id}}">
        </div>
      @endforeach
    </div>
                    <div class=" col-lg-12 mt-5">
                          <fieldset>
                            <button name="submit" type="submit" id="form-submit"  class="main-button-icon">Save Books</button>
                          </fieldset>
                    </div>
                      </div>
    </form>

Below is my route. I'm using get to display my page reservation while post to another controller where I insert my data into database.

    Route::get("/reservation",[HomeController::class,"reservation"]);
    Route::post("/reservation/{id}",[AdminController::class,"reservation"]);

This is the code for my HomeController

               public function reservation(Request $request){
    $user_id=Auth::id();
    $count=cart::where('user_id',$user_id)->count();
    $data=product::all();

    return view('reservation',compact('data','count'));

}

and this is my AdminController

             public function reservation(Request $request)
                {
    if(Auth::id()){
        $user_id=Auth::id();
        $products = '';
        $reserved_qty=0;
        $product_fee=0;
        $prod_id=0;
        $checked_array = $request->input('prod_name', []);
        $quantities = $request->input('prod_qty', []);
        $fees = $request->input('product_fee', []);
        $productid = $request->input('prod_id', []);
        foreach($checked_array as $value){
            $data = new reservation;
            $data->user_id=$user_id;
            $data->name=$request->name;
            $data->email=$request->email;
            $data->phone=$request->phone;
            $data->address=$request->address;
            $data->date=$request->date;
            $data->time=$request->time;

            $data->productz=$request->products="{$value}";
            $data->reserved_qty=$request->$reserved_qty="{$quantities[$value]}";
            $data->product_fee=$request->$product_fee=$fees[$value]*$quantities[$value];
            $data->prod_id=$request->$prod_id=$productid[$value];



            $data->save();

    }
            return redirect()->back();
    }else{
        return redirect('/login');
    }

It works before that's why I didn't make changes to my functions except in route where I added a different route method for another page. That's why I used php artisan route:clear and php artisan route:clear but the problem doesn't seem to be fixed