The uuid-config program is a little helper utility for easy configuring and building applications based on the uuid (3) library.If root=UUID=ec51d860-34bf-4374-ad46-a0c3e337fd34 is contained, the root partition is in the UUID format and requires no change. Check whether the root partition in the /boot/grub/grub.cfg configuration file contains root=/dev/xvda1 or root=UUID=ec51d860-34bf-4374-ad46-a0c3e337fd34.