diff --git a/k8s/infra/longhorn/longhorn-paperless-storageclass.yaml b/k8s/infra/longhorn/longhorn-paperless-storageclass.yaml
index 57d1f18..9ae3df2 100644
--- a/k8s/infra/longhorn/longhorn-paperless-storageclass.yaml
+++ b/k8s/infra/longhorn/longhorn-paperless-storageclass.yaml
@@ -10,6 +10,11 @@ apiVersion: storage.k8s.io/v1
 kind: StorageClass
 metadata:
   name: longhorn-paperless-media
+  annotations:
+    # StorageClass.parameters is immutable - any future edit here needs
+    # delete+recreate, not patch. Same fix as longhorn-cnpg-storageclass.yaml;
+    # safe since a StorageClass is only consulted at provisioning time.
+    argocd.argoproj.io/sync-options: Replace=true,Force=true
 provisioner: driver.longhorn.io
 allowVolumeExpansion: true
 reclaimPolicy: Retain