Okay finally I solved it!!! @charliecruzan @notbrent
My both apps were using expo sdk 38 and react-native sdk 38.
I just downgraded only one app to
“expo”: “^36.0.0”,
“react-native”: “https://github.com/expo/react-native/archive/sdk-36.0.0.tar.gz”
the other app still using sdk 39. and then I removed the node_modules and package-lock.json from the downgraded app.
sudo rm -rf ./node_modules && sudo rm -rf package-lock.json
and then I Installed new modules in it
npm i
solved some compatible warning of libraries by doing
expo install “Library name”
Built the app, and installed both apps and it worked!!. 