rename handler as it must be unique

handlers/main.yml

 ---
 # handlers file for iptables
 
-- name: Restart Service
+- name: Restart Iptables Services
   ansible.builtin.service:
     name: "{{ item }}"
     state: restarted

tasks/save.yml

@@ -8,7 +8,7 @@
   when:
     - '"ipv4" in iptables_ip_versions'
     - '"iptables" in iptables_services'
-  notify: Restart Service
+  notify: Restart Iptables Services
 
 - name: Save The Current ipv6 State
   community.general.iptables_state:
@@ -18,4 +18,4 @@
   when:
     - '"ipv6" in iptables_ip_versions'
     - '"ip6tables" in iptables_services'
-  notify: Restart Service
+  notify: Restart Iptables Services