diff --git a/calico-enterprise_versioned_docs/version-3.21-2/release-notes/index.mdx b/calico-enterprise_versioned_docs/version-3.21-2/release-notes/index.mdx
index 820410d14e..6ae1416c33 100644
--- a/calico-enterprise_versioned_docs/version-3.21-2/release-notes/index.mdx
+++ b/calico-enterprise_versioned_docs/version-3.21-2/release-notes/index.mdx
@@ -220,6 +220,12 @@ To update an existing installation of Calico Enterprise 3.21, see [Install a pat
 
 May 13, 2026
 
+:::note[Upgrading from Calico Enterprise 3.20 or earlier]
+
+Calico Enterprise 3.21 and later upgrade Kibana from 7.x to 8.x, and there is a known issue with the Kibana 7 → 8 saved-object migration when upgrading from Calico Enterprise 3.20 or earlier. The fix is included in this release — upgrade directly to 3.21.7 or later to avoid it.
+
+:::
+
 #### Enhancements
 
 * Display the `Degraded` condition's message when running `kubectl get tigerastatus`, making it easier to see error details at a glance without needing to describe the resource.
diff --git a/calico-enterprise_versioned_docs/version-3.22-2/release-notes/index.mdx b/calico-enterprise_versioned_docs/version-3.22-2/release-notes/index.mdx
index a5c8493729..c112818399 100644
--- a/calico-enterprise_versioned_docs/version-3.22-2/release-notes/index.mdx
+++ b/calico-enterprise_versioned_docs/version-3.22-2/release-notes/index.mdx
@@ -293,6 +293,12 @@ Use v3.22.4 instead, which includes a fix for this issue.
 
 :::
 
+:::note[Upgrading from Calico Enterprise 3.20 or earlier]
+
+Calico Enterprise 3.21 and later upgrade Kibana from 7.x to 8.x, and there is a known issue with the Kibana 7 → 8 saved-object migration when upgrading from Calico Enterprise 3.20 or earlier. The fix is included in this release — upgrade directly to 3.22.3 or later to avoid it.
+
+:::
+
 #### Enhancements
 
 * Display the `Degraded` condition's message when running `kubectl get tigerastatus`, making it easier to see error details at a glance without needing to describe the resource.