only terminate if the instance count is one

playbooks/edx-east/edx_provision.yml

@@ -8,12 +8,13 @@
         tags:
           Name: "{{ name_tag }}"
       register: tag_lookup
-    - fail: 'Too many results returned, not terminating!'
+    - debug: msg="Too many results returned, not terminating!"
       when: tag_lookup.instance_ids|length > 1
     - ec2:
         state: 'absent'
         region: "{{ region }}"
         instance_ids: ${tag_lookup.instance_ids}
+      when: tag_lookup.instance_ids|length == 1
   roles:
     - role: launch_ec2
       keypair: "{{ keypair }}"