A fix has been released to address this issue. System->Utilities, Fixes, Update List (wait...), select one: "004-packages_install_upgrade_error.fix", Details (if you want to), Apply.
Fixes are stored on disk on the Alt-F folder, and if it is not available or its location is changed, the fix is lost upon reboot or poweroff and needs to be reapplied.
The fix only exists for Alt-F-1.0, and it is only worth applying if you have the Alt-F on-disk packages installed on a bigger than 2TB filesystem.
The recommended where to install Alt-F on-disk packages is on a small, dedicated, always plugged USB pen/thumb drive, and in that case you don't need the fix.