I'm working on a shopping app for a school project, and I'm trying to get my product images and details to show up on the various product detail screens. I used some sample images from flutter's Shrine sample app as I followed their tutorial. The problem I'm facing now is an endless Listview scroll that looks like this, and when you keep scrolling, it repeats the image and details endlessly:

What should I do to avoid this? Sorry, I am really new to coding so I am not to sure how to go about fixing this problem...Below I have included a few dart files of my current code which might be helpful. Thank you to anyone who is willing to help, it is very much appreciated!

Product detail screen dart file:

import 'dart:math';
import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import 'package:MyShoppingApp/provider/CartProvider.dart';
import 'package:MyShoppingApp/db/cart_database.dart';
import 'package:MyShoppingApp/model/cart.dart';
import 'model/products_repository.dart';
import '../model/cart.dart';


class ProductDetailsPage extends StatelessWidget {

  static const routeName = '/user-products';
   ProductDetailsPage({Key? key}) : super(key: key); //const
  DBHelper dbHelper = DBHelper();

  @override
  Widget build(BuildContext context) {
    //get particular productId using the ModalRoute class
    final productId = ModalRoute.of(context)!.settings.arguments as String;
    print(productId);
    //use Provider package to find out ID by accessing method declared in Product()
    final loadedProduct = ProductsRepository().findById(productId);
   
    //List<bool> clicked = List.generate(10, (index) => false, growable: true);
      final cart = Provider.of<CartProvider>(context);
      void saveData(int index) {
        dbHelper
            .insert(
          CartItem(
            id: index,
            title: loadedProduct.name,
            price: loadedProduct.price.toDouble(),
            quantity: ValueNotifier(1),
            image: loadedProduct.image,
          ),
        )
            .then((value) {
          cart.addTotalPrice(loadedProduct.price.toDouble());
          cart.addCounter();
          print('Product Added to cart');
        }).onError((error, stackTrace) {
          print(error.toString());
        });
      }

    return Scaffold(
      backgroundColor: Colors.orange[50],
      appBar: AppBar(
        backgroundColor: Colors.deepOrange[900],
        title: const Text("Product details "),
        leading: IconButton(
          icon: const Icon(
            Icons.arrow_back_ios_outlined,
            color: Colors.black,
            semanticLabel: 'back to home',
          ),
          onPressed: () {
            Navigator.pop(context);
          },
        ),
      ),
        //body:
        body: ListView.builder(
            padding: const EdgeInsets.symmetric(vertical: 10.0, horizontal: 8.0),
            shrinkWrap: true,
            itemCount: loadedProduct.length,
            itemBuilder: (context, index) {
              return Card(
                //SingleChildScrollView(
                child: Column(
                  children: <Widget>[
                    SizedBox(
                      height: 300,
                      width: double.infinity,
                      child: Image.asset(
                        loadedProduct.image,
                        fit: BoxFit.cover,
                      ),
                    ),
                    const SizedBox(height: 10),
                    Text(
                      '\$${loadedProduct.price}',
                      style: const TextStyle(
                        color: Colors.grey,
                        fontSize: 20,
                      ),
                    ),
                    const SizedBox(
                      height: 10,
                    ),
                    ElevatedButton(
                        style: ElevatedButton.styleFrom(
                            primary: Colors.blueGrey.shade900),
                        onPressed: () {
                          saveData(Random().nextInt(1000));
                        },
                        child: const Text('Add to Cart')),
                    Container(
                      padding: const EdgeInsets.symmetric(horizontal: 10),
                      width: double.infinity,
                      child: Text(
                        loadedProduct.description,
                        textAlign: TextAlign.center,
                        softWrap: true,
                      ),
                    ),
                  ],
                ),
              );
            })
    );
  }
  }

Product Repository Dart file:

import 'package:flutter/material.dart';
import 'package:flutter/cupertino.dart';
import 'package:MyShoppingApp/db/cart_database.dart';
//add product data
import 'package:MyShoppingApp/model/product.dart';

//to get all products at once or any particular product by its ID
//product class that uses mixins with ChangeNotifier
class ProductsRepository with ChangeNotifier {
  DBHelper dbHelper = DBHelper();

  static List<Product> loadProducts(Category category) {
    //linked list storing objects of type Product
    var allProducts = <Product>[
      Product(
        category: Category.accessories,
        id: "0",
        isFeatured: true,
        name: 'Vagabond sack',
        price: 120,
        details: "Nice fancy shirt",
        description: "Comfortable and minimalistic",
        image: "packages/shrine_images/0-0.jpg",
      ),
      Product(
        category: Category.accessories,
        id: "1",
        isFeatured: true,
        name: 'Stella sunglasses',
        price: 58,
        details: "",
        description: "",
        image: "packages/shrine_images/1-0.jpg",
      ),
      Product(
        category: Category.accessories,
        id: "2",
        isFeatured: false,
        name: 'Whitney belt',
        price: 35,
        details: "",
        description: "",
        image: "packages/shrine_images/2-0.jpg",
      ),
      Product(
        category: Category.accessories,
        id: "3",
        isFeatured: true,
        name: 'Garden strand',
        price: 98,
        details: "",
        description: "",
        image: "packages/shrine_images/3-0.jpg",
      ),
      Product(
        category: Category.accessories,
        id: "4",
        isFeatured: false,
        name: 'Strut earrings',
        price: 34,
        details: "",
        description: "",
        image: "packages/shrine_images/4-0.jpg",
      ),//removed other products to save space
    ];

    if (category == Category.all) {
      return allProducts;
    } else {
      return allProducts.where((Product p) {
        return p.category == category;
      }).toList();
    }
  }

  //to get particular products by ID
  Product findById(String id) {
    var x = loadProducts(Category.all).firstWhere((prod) => prod.id == id);
    print("findById successful");
    print(x);
    return x;
  }
  
  void addProduct() {
    // _items.add(value);
    notifyListeners();
  }

}

Thank you everyone! Also, this problem stemmed from an earlier error in another post that a user was helping me to work through, but I didn't want to trouble them too much so I am reposting it here. Thank you @eamirho3ein