Updated to make a backup copy of the file if it already exists.
diff --git a/tasks/cwc-update.yml b/tasks/cwc-update.yml
index ea8a132..481d337 100644
--- a/tasks/cwc-update.yml
+++ b/tasks/cwc-update.yml
@@ -21,6 +21,7 @@
 
 - name: Update defaults.sh with replace_address option for Cassandra
   lineinfile:
+    backup: yes
     create: yes
     group: "{{ opdk_group_name }}"
     owner: "{{ opdk_user_name }}"