Game Progress is lost when updating on new version.

My game fails to read save file on android shipping build ue4.18.3.

I am building a update of my live game (V1.0) to update (V1.1), on updating to newer version, game in unable to access save file or create new one.

During development, I was trying to alter android permissions using"ManifestRequirementsOverride.txt" but now I have deleted this file.
Current list of permissions :-

Requirements

uses-sdk android:minSdkVersion=“16” android:targetSdkVersion=“25” />
uses-feature android:glEsVersion=“0x00020000” android:required=“true” />
uses-permission android:name=“android.permission.INTERNET” />
uses-permission android:name=“android.permission.WRITE_EXTERNAL_STORAGE” />
uses-permission android:name=“android.permission.ACCESS_NETWORK_STATE” />
uses-permission android:name=“android.permission.WAKE_LOCK” />
uses-permission android:name=“com.android.vending.CHECK_LICENSE” />
uses-permission android:name=“android.permission.ACCESS_WIFI_STATE” />
uses-permission android:name=“android.permission.MODIFY_AUDIO_SETTINGS” />
uses-permission android:name=“android.permission.VIBRATE” />
!-- Supported texture compression formats (cooked) →
supports-gl-texture android:name=“GL_KHR_texture_compression_astc_ldr” />
uses-permission android:name=“android.permission.ACCESS_COARSE_LOCATION” />
uses-permission android:name=“android.permission.ACCESS_FINE_LOCATION” />

Where should I look into editor?
Note: I have updated my project form 4.17.2 to 4.18.3.

Toggled WRITE_EXTERNAL_STORAGE permission to on and now game creates save file. But on Updating the older version, progression is lost, game is unable to read the previous save file.

Note: I have regenerated the Project ID of the game earlier, I am trying to find the previous Project ID using source control, yet no luck, could this be the possible reason ?

Okay its nothing to deal with Project ID, I have updated Android SDK as it is required by a plugin, on updating the SDK save Files location changes and thus game couldn’t trace the older save files.

Still don’t know how to resolve, looking for help or suggestions.

Bump. Have the same problem. Also wondering how to solve this problem while testing. The engine seems to uninstall the app on the android phone and then install the new one vs just reinstalling. Is there a place to specify adb command line options to overcome this? such as adb install -r or -u or whatever so that it doesn’t uninstall first.

Does anyone know this yet?