Error while packaging for distribution, something about a duplicate entry

I need to upload my game to the Google Play Store, but I keep getting an error regarding a duplicate entry.
Log:
https://pastebin.com/raw/7i9zgVTu

UATHelper: Packaging (Android (ETC1)): ERROR: Keystore file is missing. Check the DistributionSettings section in the Android tab of Project Settings

You need to generate keys for distribution: Signing Projects for Release | Unreal Engine Documentation