Upload failed You need to use a different version code for your APK because you already have one with version code 2

For people who use Android Studio the problem may be solved by editing versionCode and versionName in build.gradle instead of AndroidManifest.xml.

e.g.

defaultConfig {
    applicationId "com.my.packageId"
    minSdkVersion 15
    targetSdkVersion 22
    versionCode 2      <-- change this
    versionName "2.0"  <-- change this
}

android:versionCode="28"

Your previous versionCode was 28. You should increment it by 1 to 29.

android:versionCode="29"

Presumably, your previous app versions were 1 through 28. By releasing with versionCode 3, you are conflicting with a previous version of your app that was already released with this versionCode.