Webpack“无效配置对象”错误

我在我的webpack配置文件中遇到了一个错误,我不知道如何解决。我将入口点设置为与index.html不同的位置,并尝试进行npm运行构建,结果出现以下错误:

配置对象无效。Webpack已使用与API架构不匹配的配置对象进行初始化。

• configuration.entry不应包含项“”/mainPage/main.js’两次。 ->启动时加载所有模块。最后一个是导出的。

以下是webpack文件的代码:

const path = require('path')

//we can make entries an array with [filePath, filePath2]

module.exports = {
    mode: "development",
    //devtool: '(none)',
    entry: "./mainPage/main.js" 
    ,
    output: {
        path: path.resolve(__dirname, "dist"),
        filename: "bundle.js",
        publicPath: __dirname + '/dist',
    },
    watch: true,

    module: {
      rules: [
        { test: /\.css$/, use: ['style-loader', 'css-loader' ]},
        { test: /\.ts$/, use: 'ts-loader' },
      ],
    } 
};

这是我修改过的package.json文件:

{
  "name": "software-development",
  "version": "1.0.0",
  "description": "Food Forum Web App",
  "main": "./mainPage/main.js",
  "scripts": {
    "start": "webpack --config webpack.config.js",
    "test": "echo \"Error: no test specified\" && exit 1",
    "build": "webpack ./mainPage/main.js ./dist/bundle.js",
    "build:prod": "webpack "
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "file-loader": "^6.2.0",
    "html-loader": "^4.2.0",
    "html-webpack-plugin": "^5.5.1",
    "style-loader": "^3.3.2",
    "webpack": "^5.79.0",
    "webpack-cli": "^5.0.1"
  },
  "dependencies": {
    "firebase": "^9.19.1"
  }
}

任何帮助都将是惊人的。非常感谢。