Cannot update already installed App with APK from GitHub

[HigH-HawK]

Describe the bug I tried updating the app from version 1.22.0 to version 1.23.0 but am getting an error when doing so.

Error: App not installed as package appears to be invalid.

Initially, I installed the app from GitHub (version 1.16.1), but future updates came from the Google Play Store. Could this be the reason why I cannot update the app with the downloaded APK from GitHub?

I tried running LogCat but it does not appear to create any entries or errors in there while trying to execute the APK file. I was however able to see a warning message in the App Viewer.

Warning message: Signature of this package is different from the installed application

To Reproduce Steps to reproduce the behavior:

1. Download the app me.jmh.authenticatorpro.apk from GitHub
2. Open the app and follow the steps on screen
3. See error

Expected behavior My understanding was that updating the app with the APK from GitHub would simply update the installed app version.

Versions Abdroid: 13 Device: Samsung Galaxy S22 Ultra (SM-S908B/DS) App: 1.22.0 -> 1.23.0

[MagicLike]

This is not really an issue regarding the app, but rather a signature difference between the GitHub apk and the PlayStore apk. Android is not able to use the GitHub apk anymore, because the PlayStore as a system app has overwritten the signature which has to be used. If you would want to use GitHub as a source again, you will need to reinstall the app entirely.

[HigH-HawK]

I thought it would be something like this. Just weird that it works with other apps I manually installed, hence the question.

I did not consider it as a bug as such, was just curious about it because it works with some other apps I manually installed.