<uninstall app fully still appears the error INSTA...

# stackoverflow

[user]

uninstall app fully still appears the error INSTALL_FAILED_VERSION_DOWNGRADE when I install my app
background:
I have installed the APK built by flutter with the 4.4.30 version.
I want to install it back to 4.4.29
I uninstall the 4.4.30 app.
I install the 4.4.29 package, and it will throw the error package appears to be invalid.
I try to use ADB to install it, but the error will change to INSTALL_FAILED_VERSION_DOWNGRADE: Package Verification Result
6.no idea why the app built by flutter will cause this issue, even if I uninstall the app fully.
the solution is using ADB install -r -d...