diff --git a/admin/hooks-1.31.sh b/admin/hooks-1.31.sh
index ead147a4..0c8bfe99 100644
--- a/admin/hooks-1.31.sh
+++ b/admin/hooks-1.31.sh
@@ -14,7 +14,9 @@ pre_control_plane_upgrade_cluster() {
 
 # All things after the first controller / control plane upgrade
 post_control_plane_upgrade_cluster() {
-  echo
+  # delete previous root app controlled by kubezero module
+  kubectl delete application kubezero-git-sync -n argocd || true
+  kubectl delete appproject kubezero -n argocd || true
 }
 
 
diff --git a/admin/upgrade_cluster.sh b/admin/upgrade_cluster.sh
index 428bdf36..9a53cc35 100755
--- a/admin/upgrade_cluster.sh
+++ b/admin/upgrade_cluster.sh
@@ -38,7 +38,7 @@ read -r
 #[ "$ARGOCD" == "true" ] && kubectl edit app kubezero -n argocd || kubectl edit cm kubezero-values -n kubezero
 
 # upgrade modules
-control_plane_upgrade "apply_network, apply_addons, apply_storage, apply_operators"
+control_plane_upgrade "apply_kubezero apply_network, apply_addons, apply_storage, apply_operators"
 
 echo "Checking that all pods in kube-system are running ..."
 waitSystemPodsRunning