Multiple entries with same key: 24.0.0 rc4=24.0.0 rc4

Issue

After upgrade Android Studio to 2.2.3 it shows an error with:

IllegalArgumentException: Multiple entries with same key: 24.0.0 rc4=24.0.0 rc4 and 24.0.0 rc4=24.0.0 rc4

Solution

Just go to folder ANDROID_SDK_LOCATION/build-tools and delete 24.0.0-preview (or another folders)

Or of course you can go over Android SDK Manager / Android Studio > SDK Manager > SDK Tools > Show Package Details and uncheck preview and older RC versions. This make the same action as just delete build-tools/24... folder.

Answered By - mtrakal