diff --git a/oneshot/upgrade-pvc-cluster_deb11.yml b/oneshot/upgrade-pvc-cluster_deb11.yml
index b72697d..ae3bae1 100644
--- a/oneshot/upgrade-pvc-cluster_deb11.yml
+++ b/oneshot/upgrade-pvc-cluster_deb11.yml
@@ -93,6 +93,11 @@
       become: no
       connection: local
 
+    - name: remove possible obsolete cset configuration
+      file:
+        dest: /etc/systemd/system/ceph-osd@.service.d
+        state: absent
+
     - name: replace sources.list entries will bullseye
       replace:
         dest: "{{ item }}"
diff --git a/oneshot/upgrade-pvc-cluster_deb12.yml b/oneshot/upgrade-pvc-cluster_deb12.yml
index 8958f45..78d14d5 100644
--- a/oneshot/upgrade-pvc-cluster_deb12.yml
+++ b/oneshot/upgrade-pvc-cluster_deb12.yml
@@ -105,6 +105,11 @@
       become: no
       connection: local
 
+    - name: remove possible obsolete cset configuration
+      file:
+        dest: /etc/systemd/system/ceph-osd@.service.d
+        state: absent
+
     - name: replace sources.list entries will bookworm
       replace:
         dest: "{{ item }}"