## The problem
Issue optimizely/javascript-sdk#663 (closed, 9 comments): the SDK depended on @react-native-community/async-storage, which was deprecated; mixing it with @react-native-async-storage/async-storage in one Expo 40+ app broke the build. Maintainers switched the dependency (PR #666) and shipped it in optimizely-sdk 4.6.0, with react-sdk 2.6.0 following.
## What to do
If your React Native app breaks because it has both async-storage packages, the fix is on the SDK side: upgrade @optimizely/optimizely-sdk to 4.6.0 or later (or @optimizely/react-sdk to 2.6.0+), which moved to @react-native-async-storage/async-storage. You cannot mix the old community package and the new one in the same project, so make sure your own code imports the new package too.