ionic build android --prod error in ionic 2

[huigesv123]

using 2.0.1 android ionic 2.2.2 ,cordova 6.5.0

build prod failed: Metadata version mismatch for module
/Users/suboan/Desktop/ProjectFile/ionic2/vwAPP_2.0/node_modules/angular2-qrcode/lib/angular2-qrcode.d.ts,
found version 2.0.1, expected 1
[17:11:10] ionic-app-script task: "build"
[17:11:10] Error: Metadata version mismatch for module
/Users/suboan/Desktop/ProjectFile/ionic2/vwAPP_2.0/node_modules/angular2-qrcode/lib/angular2-qrcode.d.ts,
found version 2.0.1, expected 1
Error: Metadata version mismatch for module /Users/suboan/Desktop/ProjectFile/ionic2/vwAPP_2.0/node_modules/angular2-qrcode/lib/angular2-qrcode.d.ts, found version 2.0.1, expected 1
at StaticReflector.getModuleMetadata (/Users/suboan/Desktop/ProjectFile/ionic2/vwAPP_2.0/node_modules/@angular/compiler-cli/src/static_reflector.js:500:23)
at /Users/suboan/Desktop/ProjectFile/ionic2/vwAPP_2.0/node_modules/@angular/compiler-cli/src/codegen.js:122:46
at Array.forEach (native)
at extractProgramSymbols (/Users/suboan/Desktop/ProjectFile/ionic2/vwAPP_2.0/node_modules/@angular/compiler-cli/src/codegen.js:120:10)
at CodeGenerator.codegen (/Users/suboan/Desktop/ProjectFile/ionic2/vwAPP_2.0/node_modules/@angular/compiler-cli/src/codegen.js:57:29)
at Object.runCodegen (/Users/suboan/Desktop/ProjectFile/ionic2/vwAPP_2.0/node_modules/@ionic/app-scripts/dist/aot/codegen/codegen-ng22.js:15:26)
at Object.doCodegen (/Users/suboan/Desktop/ProjectFile/ionic2/vwAPP_2.0/node_modules/@ionic/app-scripts/dist/aot/codegen.js:6:31)
at /Users/suboan/Desktop/ProjectFile/ionic2/vwAPP_2.0/node_modules/@ionic/app-scripts/dist/aot/aot-compiler.js:41:30

[anoncodemonkey]

Yes, I am facing the same problem with this too as I was unable to find/get the correct version when use --prod. I can confirm that this problem persists for both Android and iOS.