Laravel: Attempt to read property "customer_name" on bool - php

Question

I'm new to laravel. I have to edit a form that contains a dropdown list. Edit form works fine works without the dropdown input. Updating with dropdown input throws the above error.
controller:
public function edit(QR_details $qR_detail)
{
return view('pages.edit_QR_details')->with('qr_details', $qR_detail);
}
public function update(Request $request, QR_details $qR_details)
{
$qR_details->update($request->all());
toastr()->success('QR Detail updated successfully');
return redirect()->route(('QR_code_details.index'));
}
Edit form:
form action="{{ route('QR_code_details.update', $qr_details->id) }}" method="POST" class="">
#csrf
#method("PATCH")
<div class="px-3 form-row">
<div class="form-group p-2 col-5">
<label for="" class="form-label fw-bold text-secondary">Customer Name*</label>
<select name="customer_name" class="form-select shadow" name="" id="">
#foreach ($qr_details as $qr_detail)
<option value="{{ $qr_detail->customer_name }}">{{ $qr_detail->customer_name }}</option>
#endforeach
</select>
</div>
<div class="form-group p-2 col-6">
<label for="" class="form-label text-secondary fw-bold">Background Image</label>
<input type="file" name="background image" class="form-control shadow" value="{{ $qr_details->background_image }}">
</div>
<div class="form-group p-2 col-6">
<label for="" class="form-label text-secondary fw-bold">Create QR Code</label>
<input type="file" name="create_qr_code" class="form-control shadow" value="{{ $qr_details->create_qr_code }}">
</div>
<div class="form-group p-2 col-6">
<label for="" class="form-label text-secondary fw-bold">Movable QR</label>
<input type="file" name="movable_qr" class="form-control shadow" value="{{ $qr_details->maovable_qr }}">
</div>
<div class="row ">
<div class="mt-4 col">
<button class="btn bg-gradient-danger btn-sm btn-rounded">Cancel</button>
</div>
<div class=" col mt-4">
<button class="btn bg-gradient-success btn-sm btn-rounded">Save</button>
</div>
</div>
</div>
</form>
Route:
Route::get('QR_code_detail_edit-{qR_detail}', [QRDetailsController::class, 'edit'])->name('QR_code_details.edit');
Route::post('QR_code_detail_edit-{qR_detail}', [QRDetailsController::class, 'update'])->name('QR_code_details.update');
Can someone help me out, how it should be done ?