I just experienced this too. If you don't need them, remove the adb files from ubuntu, if you're passing the USB device onto the guest OS, you don't need them anyway.
FYI, I followed an install guide online, so just reversed the install line, e.g.
sudo apt-get remove android-tools-adb android-tools-fastboot
Sorry if its teaching you to suck eggs, I've just included it for others if they stumble over the same issue.
I just experienced this too. If you don't need them, remove the adb files from ubuntu, if you're passing the USB device onto the guest OS, you don't need them anyway.
FYI, I followed an install guide online, so just reversed the install line, e.g.
sudo apt-get remove android-tools-adb android- tools-fastboot
Sorry if its teaching you to suck eggs, I've just included it for others if they stumble over the same issue.