Update in any case, i.e. IP address change.

roles/debianlive/tasks/main.yml

@@ -57,8 +57,8 @@
     regexp: "{{ item.reg }}"
     replace: "{{ item.rep }}"
   loop:
-    - reg: '^(set 210:string tftp://\${next-server}/)$'
-      rep: '#\1\nset 210:string http://{{ ansible_default_ipv4.address }}/'
+    - reg: '^set 210:string .+$'
+      rep: 'set 210:string http://{{ ansible_default_ipv4.address }}/'
     - reg: '^#(item --gap -- -- Customized Boot Entries.*)$'
       rep: '\1'
   notify: rebuild di-netboot menu