rename handler as it must be unique

handlers/main.yml

 ---
 # handlers file for mariadb
 
-- name: Restart Service
+- name: Restart Mariadb Service
   ansible.builtin.service:
     name: mariadb
     state: restarted

tasks/conf.yml

@@ -7,5 +7,5 @@
     insertafter: '^\[mysqld\]'
     regexp: '^skip-networking'
     line: 'skip-networking'
-  notify: Restart Service
+  notify: Restart Mariadb Service
   when: mariadb_disable_tcp