Cannot install an older version of a app (self update)

[sudo-joe]

Hello

Describe the bug
After receiving the notification that a new version of Obtainium (1.2.9) is available, I tap the download icon, but immediately get the error message: "Cannot install an older version of an app"

This happened in the Owner profile of GrapheneOS (repeatedly tapping the DL icon doesn’t fix the issue). After switching to a regular profile, version 1.2.9 is shown as installed.

Please complete the following information:

• Device: Pixel 8
• OS: GrapheneOS 16
• Obtainium Version: 1.2.8 (but the same problem did exist with older versions of Obtainium