use lineinfile

roles/nextcloud/tasks/install.yml

@@ -183,6 +183,8 @@
     mode: 0644
 
 - name: Add 'nextcloud_installed' variable values to {{ iiab_installed }}
-  ini_file:
-    path: "{{ iiab_installed }}"
-    value: nextcloud_installed
+  lineinfile:
+    dest: "{{ iiab_installed }}"
+    regexp: '^nextcloud_installed'
+    line: 'nextcloud_installed'
+    state: present

roles/nextcloud/tasks/prov-db.yml

@@ -51,7 +51,7 @@
 # nextcloud_user/nextcloud_user_password) is just not needed in the end...
 #
 # NOTE: COMMENTS (FOLLOWING '#' SIGN) WITHIN A SHELL COMMAND CAUSE IT TO *FAIL*
-# 
+#
 #- name: Determine if Nextcloud user exists already
 #  shell: >
 #    php {{ nextcloud_prefix }}/nextcloud/occ user:list |