Update Debian/Vyos packages?

Hi ,

i added Debian squeeze and squeeze-lts repo. VyOS Version is 1.1.1

show system package auto-sync 1 repository community { components main distribution helium password "" url http://packages.vyos.net/vyos username "" } repository squeeze { components "main contrib non-free" distribution squeeze url http://mirrors.kernel.org/debian } repository squeeze-lts { components "main contrib non-free" distribution squeeze-lts url http://mirrors.kernel.org/debian }
after sudo apt-get update
some packages are possible to upgradesudo apt-get upgrade Reading package lists... Done Building dependency tree Reading state information... Done The following packages have been kept back: live-initramfs The following packages will be upgraded: bind9-host conntrack conntrackd cpio grub-common grub-pc host libbind9-60 libcap2-bin libdns69 libisc62 libisccc60 libisccfg62 liblwres60 libnetfilter-conntrack3 libsnmp-base libsnmp-perl libsnmp15 lldpd ntp ntpdate openvpn pmacct tcpdump vyatta-cfg-system vyatta-keepalived vyatta-ppp vyatta-quagga vyatta-webgui 28 upgraded, 0 newly installed, 0 to remove and 1 not upgraded. Need to get 13.1 MB of archives. After this operation, 1495 kB disk space will be freed.

Is it recommended/allowed to upgrade these packages?

Thnaks,
msc

I am also interested in the answer.
Thank you.