euca-authorize fail to add rule

I cannot add rule using source group.
Here is what i'm trying to do:

Openstack diablo4 release.

build@redhat:/$euca-describe-groups
GROUP pioneer_project default default

build@redhat:/$euca-add-group ert -d ert
GROUP ert ert
build@redhat:/$euca-add-group ert2 -d ert2
GROUP ert2 ert2
build@redhat:/$euca-authorize --protocol icmp -t -1:-1 --source-group ert ert2
ert2 ert None icmp -1 -1 0.0.0.0/0
GROUP ert2
PERMISSION ert2 ALLOWS icmp -1 -1 GRPNAME ert FROM CIDR 0.0.0.0/0
build@redhat:/$euca-authorize --protocol tcp --port-range 22 --source-group ert ert2
ert2 ert None tcp 22 22 0.0.0.0/0
ApiError: {'to_port': 22, 'group_id': 8L, 'protocol': 'tcp', 'from_port': 22, 'parent_group_id': 9L} - This rule already exists in group