apt-get install rabbitmq-server failing on lucid32

gistfile1.txt

err: /Stage[main]/Rabbitmq::Server/Package[rabbitmq-server]/ensure: change from purged to present failed: Execution of '/usr/bin/apt-get -q -y -o DPkg::Options::=--force-confold install rabbitmq-server' returned 100: Reading package lists...
Building dependency tree...
Reading state information...
The following extra packages will be installed:
  erlang-asn1 erlang-base erlang-corba erlang-crypto erlang-docbuilder
  erlang-edoc erlang-eunit erlang-ic erlang-inets erlang-inviso erlang-mnesia
  erlang-nox erlang-odbc erlang-os-mon erlang-parsetools erlang-percept
  erlang-public-key erlang-runtime-tools erlang-snmp erlang-ssh erlang-ssl
  erlang-syntax-tools erlang-tools erlang-webtool erlang-xmerl libltdl7
  libsctp1 lksctp-tools odbcinst odbcinst1debian1 unixodbc
Suggested packages:
  erlang erlang-manpages erlang-doc-html erlang-observer libmyodbc
  odbc-postgresql tdsodbc unixodbc-bin
The following NEW packages will be installed:
  erlang-asn1 erlang-base erlang-corba erlang-crypto erlang-docbuilder
  erlang-edoc erlang-eunit erlang-ic erlang-inets erlang-inviso erlang-mnesia
  erlang-nox erlang-odbc erlang-os-mon erlang-parsetools erlang-percept
  erlang-public-key erlang-runtime-tools erlang-snmp erlang-ssh erlang-ssl
  erlang-syntax-tools erlang-tools erlang-webtool erlang-xmerl libltdl7
  libsctp1 lksctp-tools odbcinst odbcinst1debian1 rabbitmq-server unixodbc
0 upgraded, 32 newly installed, 0 to remove and 0 not upgraded.
Need to get 12.5MB of archives.
After this operation, 23.6MB of additional disk space will be used.
WARNING: The following packages cannot be authenticated!
  rabbitmq-server
E: There are problems and -y was used without --force-yes