Start react native app in android emulator

npx react-native run-android

npx react-native run-android
...
...
...
* What went wrong:
Execution failed for task ':app:installDebug'.
> java.util.concurrent.ExecutionException: com.android.builder.testing.api.DeviceException: com.android.ddmlib.InstallException: INSTALL_FAILED_VERSION_DOWNGRADE