SQLSTATE[HY000]: General error: 1364 Field 'id_gambar_paket' doesn't have a default value

i want to upload multiple images to a form. but before it did it, i created a table gambar_paket in the database so I can upload multiple images by making a relation with another table to fill in the form.

when I try to upload 3 images, the result is like this. how to solve it?

Here is my migration table for the multiple images gambar_paket

public function up()
    {
        Schema::create('gambar_paket', function (Blueprint $table) {
            $table->string('id_gambar_paket')->primary();
            $table->string('idpaket', 6)->nullable();
            $table->string('cover_paket')->nullable();

            $table->timestamps();
        });

        Schema::table('gambar_paket', function (Blueprint $table){
            $table->foreign('idpaket')->references('id_paket')->on('paket_preorder')->onDelete('cascade');
        });
    }

here is model for GambarPaket.php

protected $table = 'gambar_paket';

    protected $fillable = [
        'id_gambar paket',
        'idpaket',
        'cover_paket'
    ];

    protected $primaryKey = 'id_gambar_paket';

    protected $keyType = 'string';

    public $incrementing = false;

    public $timestamps = false;

i made PaketPreorder.php hasMany relation with GambarPaket.php

protected $table = 'paket_preorder';

    protected $fillable = [
            'id_paket',
            'idkatalog',
            'idbuku',
            'cover_paket',
            'nama_paket',
            'harga_paket',
            'qty_paket',
            'desc_paket',
            'slug',
            'status_paket'
    ];

    protected $primaryKey = 'id_paket';

    protected $keyType = 'string';

    public $incrementing = false;

    public $timestamps = false;

    public function gambarPaket(){
        return $this->hasMany(GambarPaket::class, 'idpaket', 'id_paket');
    }

here is PaketPreorderController.php

class PaketPreorderController extends Controller
{
    //main page paket preorder
    public function index(){
        return view('admin.paketpreorder.index');
    }

    //input data
    public function create(){

        $katalogs = Katalog::all();
        $listbuku = Buku::all();
        return view('admin.paketpreorder.create', compact('katalogs', 'listbuku'));
    }

    public function store(PaketPreorderFormRequest $request){
        $validatedData = $request->validated();

        $katalog = Katalog::findOrFail($validatedData['idkatalog']);
        $paket = $katalog->paketpreorder()->create([
            'idkatalog'     => $validatedData['idkatalog'],
            'id_paket'      => $validatedData['id_paket'],
            'idbuku'        => $validatedData['idbuku'],
            'nama_paket'    => $validatedData['nama_paket'],
            'harga_paket'   => $validatedData['harga_paket'],
            'qty_paket'     => $validatedData['qty_paket'],
            'desc_paket'    => $validatedData['desc_paket'],
            'slug'          => Str::slug($validatedData['slug']), //rada error tadi
            'status_paket'  => $request->status_paket == true ? '1' :'0'
        ]);

        if($request->hasFile('cover_paket')){
            $uploadPath = 'uploads/paketpreorder/'; //tmpt simpen gambar paket
 
            $i = 1;
            foreach($request->file('cover_paket') as $imageFile){
                $ext            = $imageFile->getClientOriginalExtension();
                $filename       = time().$i++.'.'.$ext;
                $imageFile->move('$uploadPath, $filename');
                $finalImagePathName = $uploadPath.$filename;
            
                
                $paket->gambarPaket()->create([
                    'idpaket' => $paket->id_paket, //idpaket dari GambarPaket
                    'cover_paket' => $finalImagePathName,
                ]);
            }
        }
        return redirect ('/admin/paketpreorder')->with('message', 'Data paket pre-order berhasil ditambahkan!');
    }
}

here is create.blade.php

<div class="tab-pane fade border p-3" id="gambarpaket" role="tabpanel" aria-labelledby="gambarpaket-tab">
                            <div class = "mb-3">
                                <label> Kode Gambar Paket</label>
                                <input type = "text" name = "id_gambar_paket" minlength="6" maxlength="6" placeholder="cont: GP0001" class = "form-control" />
                                    @error('id_gambar_paket') <small class = "text-danger">{{ $message }}</small>
                                    @enderror
                            </div>
                            <div class = "mb-3 mt-3">
                                <label> Unggah Gambar Paket Pre-Order</label>
                                <input type = "file" name = "cover_paket[]" multiple class = " multiple form-control">
                            </div>
                        </div>

here is PaketPreorderFormRequest.php

'cover_paket' => [
                'nullable',
            ],
 'cover_paket.*' => [
                'mimes:jpg,jpeg,png'
            ]