This happens after an interface was assigned a DHCP address for a long time (days) and then switching back to a static address.
vyos@vyos# delete interfaces ethernet eth0 vif 201 address dhcp vyos@vyos# set interfaces ethernet eth0 vif 201 address 172.18.201.10/24 vyos@vyos# commit [ interfaces ethernet eth0 vif 201 address dhcp ] sed: can't read /var/lib/dhcp/dhclient_eth0.201.leases: No such file or director y Usage: grep [OPTION]... PATTERN [FILE]... Try 'grep --help' for more information.
The commit is performed but the error message is annoying.