title: Failure [INSTALL_FAILED_VERSION_DOWNGRADE] on real device
body: <p>I'm trying to run my custom launcher3 apk from my android studio to onePlus mobile phone.Its API level is 23. this app works fine Up to level 22 but always getting error Failure [INSTALL_FAILED_VERSION_DOWNGRADE] on API level 23 and shows popup that uninstall the existing app. and infect this apk is not already installed. and when i tried with pressing OK button the it shows DELETE FAILED INTERNAL ERROR . I'm not getting the any solution. please help me. I tried to change the versionCode, VersionName API Level etc. but no solution. here is my gradle file</p>
  
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  <pre class="snippet-code-html lang-html prettyprint-override"><code>apply plugin: 'com.android.application'
  
  android {
      compileSdkVersion 23
      buildToolsVersion "23.0.2"
      defaultConfig {
          applicationId "com.android.launcher3"
          minSdkVersion 14
          targetSdkVersion 23
          versionCode 1
          versionName '1.0'
      }
      buildTypes {
          release {
              minifyEnabled false
              proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
          }
      }
      productFlavors {
      }
  }
  
  dependencies {
      compile fileTree(include: ['*.jar'], dir: 'libs')
      compile project(':wallpaperpick')
      compile 'com.github.yukuku:ambilwarna:2.0.1'
      compile 'com.android.support:support-v4:24.0.0-alpha1'
  }</code></pre>
  </div>
  </div>
  </p>