docs(1.8.0): update important note

Longhorn 10010 Signed-off-by: Derek Su <[email protected]>
longhorn · Jan 21, 2025 · 3297bee · 3297bee
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diff --git a/content/docs/1.8.0/important-notes/_index.md b/content/docs/1.8.0/important-notes/_index.md
@@ -9,6 +9,7 @@ Please see [here](https://github.com/longhorn/longhorn/releases/tag/v{{< current
 - [Deprecation](#deprecation)
   - [Environment Check Script](#environment-check-script)
 - [General](#general)
+  - [Kubernetes Version Requirement](#kubernetes-version-requirement)
   - [Upgrade Check Events](#upgrade-check-events)
   - [Manual Checks Before Upgrade](#manual-checks-before-upgrade)
   - [Install/Upgrade with Helm Controller](#installupgrade-with-helm-controller)
@@ -41,6 +42,10 @@ The functionality of the [environment check script](https://github.com/longhorn/
 
 ## General
 
+### Kubernetes Version Requirement
+
+Before upgrading to Longhorn v1.8.0 or a newer version, ensure that all clusters are running Kubernetes v1.25 or later.
+
 ### Upgrade Check Events
 Longhorn performs a pre-upgrade check when upgrading with Helm or Rancher App Marketplace.  If a check fails, the upgrade will stop and the reason for the check's failure will be recorded in an event.  For more detail, see [Upgrading Longhorn Manager](../deploy/upgrade/longhorn-manager).
 

diff --git a/content/docs/1.9.0/important-notes/_index.md b/content/docs/1.9.0/important-notes/_index.md
@@ -9,6 +9,7 @@ Please see [here](https://github.com/longhorn/longhorn/releases/tag/v{{< current
 - [Deprecation](#deprecation)
   - [Environment Check Script](#environment-check-script)
 - [General](#general)
+  - [Kubernetes Version Requirement](#kubernetes-version-requirement)
   - [Upgrade Check Events](#upgrade-check-events)
   - [Manual Checks Before Upgrade](#manual-checks-before-upgrade)
   - [Install/Upgrade with Helm Controller](#installupgrade-with-helm-controller)
@@ -41,6 +42,10 @@ The functionality of the [environment check script](https://github.com/longhorn/
 
 ## General
 
+### Kubernetes Version Requirement
+
+Before upgrading to Longhorn v1.8.0 or a newer version, ensure that all clusters are running Kubernetes v1.25 or later.
+
 ### Upgrade Check Events
 Longhorn performs a pre-upgrade check when upgrading with Helm or Rancher App Marketplace.  If a check fails, the upgrade will stop and the reason for the check's failure will be recorded in an event.  For more detail, see [Upgrading Longhorn Manager](../deploy/upgrade/longhorn-manager).