Angular – An unhandled exception occurred: Configuration ‘production’ is not set in the workspace

Hi Created one project in Angular 8.
Initially it was supporting only one default language (US-EN). then I applied localization.

before localization for preparing production build, I used to give following command.

ng build --prod --base-href "/Windchill/com/qiwkCollaborator/"

after localization, I made some changes in the angular.json and in package.json. after making these changes whenever I am giving any command to prepare to build it is giving me the following error.

An unhandled exception occurred: Configuration 'production' is not set in the workspace.

some portion of Package.json file is as follows:

"name": "qwik-collaborator",
  "version": "1.0.0",
  "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "build": "ng build",
    "test": "ng test",
    "lint": "ng lint",
    "e2e": "ng e2e",
    "build-locale:en": "ng build --prod --i18n-locale en --i18n-format xlf --i18n-file src/translate/messages.en.xlf --output-path=dist/en --baseHref /en/",
    "build-locale:fr": "ng build --prod --i18n-locale fr --i18n-format xlf --i18n-file src/translate/messages.fr.xlf --output-path=dist/fr --baseHref /fr/"

some portion of Angular.json file is as follows.

"build": {

          "configurations": {
            "fr": {
            "aot": true,
            "outputPath": "dist/qwikCollaborator/fr/",
            "i18nFile": "src/translate/messages.fr.xlf",      
            "i18nFormat": "xlf",      
            "i18nLocale": "fr",      
            "i18nMissingTranslation": "error"    
             },
             "en": {
            "aot": true,
            "outputPath": "dist/qwikCollaborator/en/",
            "i18nFile": "src/translate/messages.en.xlf",      
            "i18nFormat": "xlf",      
            "i18nLocale": "en",      
            "i18nMissingTranslation": "error"    
             }  
           },
          "builder": "@angular-devkit/build-angular:browser",
          "options": {
            "outputPath": "dist/qwikCollaborator",
            "index": "src/index.html",
            "main": "src/main.ts",
            "polyfills": "src/polyfills.ts",
            "tsConfig": "tsconfig.app.json",
            "aot": false,
            "assets": [
              "src/favicon.ico",
              "src/assets"
            ],
            "styles": [
              "src/styles.scss",
              "src/assets/css/custom-mobile.css",
              "src/assets/css/custom.css"
            ],
            "scripts": [
              "node_modules/jquery/dist/jquery.min.js",
              "src/assets/js/qwikCollaborator.js"
            ]
          },
          "configurations": {
          "es5": {
        "tsConfig": "./tsconfig.es5.json"
      },
            "production": {
              "fileReplacements": [
                {
                  "replace": "src/environments/environment.ts",
                  "with": "src/environments/environment.prod.ts"
                }
              ],
.......


"serve": {
           "configurations": {
            "fr": {
            "browserTarget": "qwikCollaborator:build:fr" 
            },
            "en": {
            "browserTarget": "qwikCollaborator:build:en" 
            } ,
            },
          "builder": "@angular-devkit/build-angular:dev-server",
          "options": {
            "browserTarget": "qwikCollaborator:build"
          },

          "configurations": {
          "es5": {
        "browserTarget": "qwikCollaborator:build:es5"
      },
            "production": {
              "browserTarget": "qwikCollaborator:build:es5"
            }
          }
        },

can anyone help me with this?