I installed Manjaro Gnome and then later installed Manjaro KDE in a dual boot. I didn't want KDE anymore, so I used GParted and deleted the KDE partition and resized the Gnome partition. I then typed "sudo update-grub" in the terminal and restarted. And got this error message:
error: no such partition
Entering rescue mode...
How can I fix this without having to reinstall?