Instead of giving the device explicitly, one may indicate the (ext2 or xfs)
filesystem that is to be mounted by its UUID or volume label (cf. e2label(8) or
xfs_admin(8)), writing LABEL=<label> or UUID=<uuid>, e.g., `LABEL=Boot' or
`UUID=3e6be9de-8139-11d1-9106-a43f08d823a6'. This will make the system more
robust: adding or removing a SCSI disk changes the disk device name but not the
filesystem volume label.
you can change all entries with LABEL to entries without LABEL, but make sure the same content is provided on them, e.g. when you do the changes from above, will /var/db still exist on some other partition? does /var on /dev/sdb5 has a dir named db? if that one is critical for your system to operate/boot, it wont come up after the changes properly