Grrrrr. - is not valid in a variable name

inventory/group_vars/arm-packager

@@ -2,5 +2,5 @@
 fas_client_groups: packager
 freezes: false
 sudoers: "{{ private }}/files/sudo/arm-packager"
-sudoers-main: nopasswd
+sudoers_main: nopasswd
 host_group: cloud

inventory/group_vars/arm-qa

@@ -2,6 +2,6 @@
 fas_client_groups: sysadmin-qa,arm-qa,qa
 freezes: false
 sudoers: "{{ private }}/files/sudo/arm-qa-sudoers"
-sudoers-main: nopasswd
+sudoers_main: nopasswd
 libdir: /usr/lib
 host_group: cloud

tasks/sudo.yml

@@ -8,7 +8,7 @@
 #
 - name: setup /etc/sudoers.d/sysadmin-main
   copy: src="{{ private }}/files/sudo/sysadmin-main" dest=/etc/sudoers.d/ owner=root group=root mode=0600
-  when: sudoers-main == 'passwd'
+  when: sudoers_main == 'passwd'
   tags:
   - config
 #
@@ -16,7 +16,7 @@
 #
 - name: setup /etc/sudoers.d/sysadmin-main (nopasswd)
   copy: src="{{ private }}/files/sudo/sysadmin-main-nopasswd" dest=/etc/sudoers.d/ owner=root group=root mode=0600
-  when: sudoers-main == 'nopasswd'
+  when: sudoers_main == 'nopasswd'
   tags:
   - config
 #

vars/global.yml

@@ -34,4 +34,4 @@ netapp_iscsi_name: iqn.1992-08.com.netapp:sn.1573980081:vf.6fb258f4-106f-11e2-ae
 # iscsi portal for netapp iscsi volume
 netapp_iscsi_portal: 10.5.88.35
 #
-sudoers-main: passwd
+sudoers_main: passwd