Parse Error There is a problem parsing the package while installing Android application

Question

While installing the Android application, I encountered this issue (Parse Error : There is a problem parsing the package.). I took the subsequent actions.

1. My first installation of the program went smoothly.

2. I updated the version number in the manifest file and made adjustments to the currently running application.

   <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="org.openintents.samples.BasicOpenARDemo" android:versionCode="2" android:versionName="1.0.1">
   

3. I export the application after which I complete the code signing step. To export, right-click your project node and select an item. You'll find a wizard there. Complete the code signing while following the steps.

4. I downloaded the ARDemo.apk file and renamed it to ARDemo1.apk.

5. After moving this apk file to my phone's SD card and starting the installation, I encountered the aforementioned issue.

I looked it up online, and they claim there is a manifest file unpacking issue.

Can someone please explain what might be wrong with my procedure?