diff --git a/src/atoms/user.ts b/src/atoms/user.ts
index e75d3067..67370036 100644
--- a/src/atoms/user.ts
+++ b/src/atoms/user.ts
@@ -28,13 +28,74 @@ export const initialPasswordAtom = atomWithStorage<string>(
   ''
 );
 
-export const getCurrentOrganizationId = (): string => {
+// Namespace the server creates for an Org's resources on each Kubernetes
+// cluster. The format must match the backend's ``get_namespace_name``
+// helper — ``gpustack-{slug}`` — because the GPU-instance / storage CRDs
+// (worker.gpustack.ai/v1) are namespaced and the server-side admission
+// keys off this exact name.
+//
+// Resolution path:
+//   1. The Org the caller is currently acting under — the enterprise
+//      plugin persists ``currentOrganizationId`` (numeric) when the user
+//      picks an Org via OrgSwitcher.
+//   2. The cluster's own owner Org — used in the platform-admin "All"
+//      view, where the caller has no Org context but the resource still
+//      has to land in *some* Org's namespace.
+//   3. ``gpustack-default`` as a last resort (first load before any
+//      cache is hydrated, or a cluster whose owner Org is missing from
+//      both caches).
+//
+// Called outside React (umi page utilities) so it reads localStorage
+// directly rather than going through a Jotai hook. The org caches are
+// kept fresh by the enterprise plugin's atomWithStorage atoms, and the
+// OrgSwitcher reloads the page on switch so we don't need in-process
+// reactivity here.
+export const getCurrentOrgNamespace = (
+  clusterOwnerPrincipalId?: number | null
+): string => {
+  return (
+    lookupOrgNamespace(getStoredCurrentOrgId()) ??
+    lookupOrgNamespace(clusterOwnerPrincipalId ?? null) ??
+    'gpustack-default'
+  );
+};
+
+const getStoredCurrentOrgId = (): number | null => {
   try {
     const raw = localStorage.getItem('currentOrganizationId');
-    if (raw) {
-      const value = JSON.parse(raw);
-      if (value != null) return String(value);
+    if (!raw) return null;
+    const value = JSON.parse(raw);
+    return typeof value === 'number' ? value : null;
+  } catch {
+    return null;
+  }
+};
+
+// Org caches the enterprise plugin persists. ``organizationList`` is
+// the caller's member orgs; ``allOrganizations`` is admin-only (every
+// Org on the platform) so admin sessions can resolve any owner Org id.
+// Both are checked because ``currentOrganizationId`` is null in the
+// admin "All" view but a member org's slug might still cover the
+// cluster-owner fallback.
+const ORG_CACHE_KEYS = ['organizationList', 'allOrganizations'] as const;
+
+const lookupOrgNamespace = (id: number | null): string | null => {
+  if (id == null) return null;
+  // Normalise both sides to strings — the stored id type varies between
+  // localStorage payloads (some writers stringify, others persist as a
+  // JSON number); strict equality would silently miss those cases.
+  const target = String(id);
+  for (const key of ORG_CACHE_KEYS) {
+    try {
+      const raw = localStorage.getItem(key);
+      if (!raw) continue;
+      const list = JSON.parse(raw) as Array<{ id: number; slug?: string }>;
+      if (!Array.isArray(list)) continue;
+      const match = list.find((item) => String(item?.id) === target);
+      if (match?.slug) return `gpustack-${match.slug}`;
+    } catch {
+      // ignore malformed cache; continue checking other keys
     }
-  } catch {}
-  return 'gpustack-default';
+  }
+  return null;
 };
diff --git a/src/pages/cluster-management/config/types.ts b/src/pages/cluster-management/config/types.ts
index ab05735e..c587c453 100644
--- a/src/pages/cluster-management/config/types.ts
+++ b/src/pages/cluster-management/config/types.ts
@@ -88,6 +88,9 @@ export interface ClusterListItem {
   state_message: string;
   worker_pools: NodePoolListItem[];
   k8s_volume_mounts?: VolumeMount[];
+  // Backend ClusterPublic carries this; admin-"All" namespace
+  // resolution falls back to the cluster's owner Org slug.
+  owner_principal_id?: number;
 }
 
 export interface ClusterFormData {
diff --git a/src/pages/gpu-service/instances/forms/storage-volume.tsx b/src/pages/gpu-service/instances/forms/storage-volume.tsx
index db15c367..ee867d44 100644
--- a/src/pages/gpu-service/instances/forms/storage-volume.tsx
+++ b/src/pages/gpu-service/instances/forms/storage-volume.tsx
@@ -1,7 +1,9 @@
-import { getCurrentOrganizationId } from '@/atoms/user';
+import { currentClusterAtom } from '@/atoms/gpuservice';
+import { getCurrentOrgNamespace } from '@/atoms/user';
 import { InputNumber as CInputNumber, Select } from '@gpustack/core-ui';
 import { useIntl } from '@umijs/max';
 import { Button, Flex, Form, Radio } from 'antd';
+import { useAtomValue } from 'jotai';
 import { useEffect, useMemo, useState } from 'react';
 import styled from 'styled-components';
 import { FormData as StorageFormData } from '../../storage/config/types';
@@ -29,7 +31,8 @@ const StorageVolume = () => {
 
   const form = Form.useFormInstance<FormData>();
 
-  const namespace = getCurrentOrganizationId();
+  const currentCluster = useAtomValue(currentClusterAtom);
+  const namespace = getCurrentOrgNamespace(currentCluster?.owner_principal_id);
 
   useEffect(() => {
     fetchStorage({});
diff --git a/src/pages/gpu-service/instances/index.tsx b/src/pages/gpu-service/instances/index.tsx
index 051ad130..c892f9d6 100644
--- a/src/pages/gpu-service/instances/index.tsx
+++ b/src/pages/gpu-service/instances/index.tsx
@@ -1,5 +1,5 @@
 import { currentClusterAtom } from '@/atoms/gpuservice';
-import { getCurrentOrganizationId } from '@/atoms/user';
+import { getCurrentOrgNamespace } from '@/atoms/user';
 import { PageAction } from '@/config';
 import { PaginationKey, TABLE_SORT_DIRECTIONS } from '@/config/settings';
 import type { PageActionType } from '@/config/types';
@@ -33,9 +33,11 @@ import useUpdateInstance from './services/use-update-instance';
 
 const GPUService: React.FC = () => {
   const intl = useIntl();
-  const namespace = getCurrentOrganizationId();
   const [currentCluster, setCurrentCluster] = useAtom(currentClusterAtom);
   const clusterID = currentCluster?.id;
+  // In admin "All" view there's no Org context, so the helper falls
+  // back to the selected cluster's owner Org slug.
+  const namespace = getCurrentOrgNamespace(currentCluster?.owner_principal_id);
 
   const deleteInstance = useCallback(
     (id: number) => deleteGPUServiceInstance({ namespace, clusterID, id }),
diff --git a/src/pages/gpu-service/instances/services/use-create-instance.ts b/src/pages/gpu-service/instances/services/use-create-instance.ts
index a3196b10..efefffa8 100644
--- a/src/pages/gpu-service/instances/services/use-create-instance.ts
+++ b/src/pages/gpu-service/instances/services/use-create-instance.ts
@@ -1,5 +1,5 @@
 import { currentClusterAtom } from '@/atoms/gpuservice';
-import { getCurrentOrganizationId } from '@/atoms/user';
+import { getCurrentOrgNamespace } from '@/atoms/user';
 import { useQueryData } from '@gpustack/core-ui';
 import { useAtomValue } from 'jotai';
 import { useCallback } from 'react';
@@ -12,9 +12,11 @@ interface CreateInstanceParams {
 }
 
 export default function useCreateInstance() {
-  const namespace = getCurrentOrganizationId();
   const currentCluster = useAtomValue(currentClusterAtom);
   const clusterID = currentCluster?.id;
+  // Admin "All" view has no Org context — fall back to the
+  // selected cluster's owner Org slug for the K8s namespace.
+  const namespace = getCurrentOrgNamespace(currentCluster?.owner_principal_id);
 
   const fetchDetail = useCallback(
     (params: CreateInstanceParams, option?: any) =>
diff --git a/src/pages/gpu-service/instances/services/use-update-instance.ts b/src/pages/gpu-service/instances/services/use-update-instance.ts
index 239dd378..00cdcfb9 100644
--- a/src/pages/gpu-service/instances/services/use-update-instance.ts
+++ b/src/pages/gpu-service/instances/services/use-update-instance.ts
@@ -1,5 +1,5 @@
 import { currentClusterAtom } from '@/atoms/gpuservice';
-import { getCurrentOrganizationId } from '@/atoms/user';
+import { getCurrentOrgNamespace } from '@/atoms/user';
 import { useQueryData } from '@gpustack/core-ui';
 import { useAtomValue } from 'jotai';
 import { useCallback } from 'react';
@@ -13,9 +13,11 @@ interface UpdateInstanceParams {
 }
 
 export default function useUpdateInstance() {
-  const namespace = getCurrentOrganizationId();
   const currentCluster = useAtomValue(currentClusterAtom);
   const clusterID = currentCluster?.id;
+  // Admin "All" view has no Org context — fall back to the
+  // selected cluster's owner Org slug for the K8s namespace.
+  const namespace = getCurrentOrgNamespace(currentCluster?.owner_principal_id);
 
   const fetchDetail = useCallback(
     (params: UpdateInstanceParams, option?: any) =>
diff --git a/src/pages/gpu-service/storage/index.tsx b/src/pages/gpu-service/storage/index.tsx
index 74ce04e7..aa55e0f5 100644
--- a/src/pages/gpu-service/storage/index.tsx
+++ b/src/pages/gpu-service/storage/index.tsx
@@ -1,5 +1,5 @@
 import { currentClusterAtom } from '@/atoms/gpuservice';
-import { getCurrentOrganizationId } from '@/atoms/user';
+import { getCurrentOrgNamespace } from '@/atoms/user';
 import { PageAction } from '@/config';
 import { PaginationKey, TABLE_SORT_DIRECTIONS } from '@/config/settings';
 import type { PageActionType } from '@/config/types';
@@ -34,9 +34,11 @@ import useUpdateStorage from './services/use-update-storage';
 
 const GPUServiceStorage: React.FC = () => {
   const intl = useIntl();
-  const namespace = getCurrentOrganizationId();
   const [currentCluster, setCurrentCluster] = useAtom(currentClusterAtom);
   const clusterID = currentCluster?.id;
+  // Admin "All" view falls back to the cluster's owner Org slug —
+  // see :func:`getCurrentOrgNamespace`.
+  const namespace = getCurrentOrgNamespace(currentCluster?.owner_principal_id);
 
   const deleteStorage = useCallback(
     (id: number) => deleteGPUServiceStorage({ namespace, clusterID, id }),
diff --git a/src/pages/gpu-service/storage/services/use-create-storage.ts b/src/pages/gpu-service/storage/services/use-create-storage.ts
index b36c62b5..745e55ec 100644
--- a/src/pages/gpu-service/storage/services/use-create-storage.ts
+++ b/src/pages/gpu-service/storage/services/use-create-storage.ts
@@ -1,5 +1,5 @@
 import { currentClusterAtom } from '@/atoms/gpuservice';
-import { getCurrentOrganizationId } from '@/atoms/user';
+import { getCurrentOrgNamespace } from '@/atoms/user';
 import { useQueryData } from '@gpustack/core-ui';
 import { useAtomValue } from 'jotai';
 import { useCallback } from 'react';
@@ -12,9 +12,11 @@ interface CreateStorageParams {
 }
 
 export default function useCreateStorage() {
-  const namespace = getCurrentOrganizationId();
   const currentCluster = useAtomValue(currentClusterAtom);
   const clusterID = currentCluster?.id;
+  // Admin "All" view has no Org context — fall back to the
+  // selected cluster's owner Org slug for the K8s namespace.
+  const namespace = getCurrentOrgNamespace(currentCluster?.owner_principal_id);
 
   const fetchDetail = useCallback(
     (params: CreateStorageParams, option?: any) =>
diff --git a/src/pages/gpu-service/storage/services/use-query-storage.ts b/src/pages/gpu-service/storage/services/use-query-storage.ts
index 70f36d84..c49a868e 100644
--- a/src/pages/gpu-service/storage/services/use-query-storage.ts
+++ b/src/pages/gpu-service/storage/services/use-query-storage.ts
@@ -1,5 +1,5 @@
 import { currentClusterAtom } from '@/atoms/gpuservice';
-import { getCurrentOrganizationId } from '@/atoms/user';
+import { getCurrentOrgNamespace } from '@/atoms/user';
 import { useQueryData } from '@gpustack/core-ui';
 import { useAtomValue } from 'jotai';
 import { useCallback } from 'react';
@@ -7,9 +7,11 @@ import { queryGPUServiceStorage } from '../apis';
 import { ListItem } from '../config/types';
 
 export default function useQueryStorage() {
-  const namespace = getCurrentOrganizationId();
   const currentCluster = useAtomValue(currentClusterAtom);
   const clusterID = currentCluster?.id;
+  // Admin "All" view has no Org context — fall back to the
+  // selected cluster's owner Org slug for the K8s namespace.
+  const namespace = getCurrentOrgNamespace(currentCluster?.owner_principal_id);
 
   const fetchDetail = useCallback(
     (params: Global.K8sSearchParams = {}, options?: any) =>
diff --git a/src/pages/gpu-service/storage/services/use-update-storage.ts b/src/pages/gpu-service/storage/services/use-update-storage.ts
index d3645c23..47941f6d 100644
--- a/src/pages/gpu-service/storage/services/use-update-storage.ts
+++ b/src/pages/gpu-service/storage/services/use-update-storage.ts
@@ -1,5 +1,5 @@
 import { currentClusterAtom } from '@/atoms/gpuservice';
-import { getCurrentOrganizationId } from '@/atoms/user';
+import { getCurrentOrgNamespace } from '@/atoms/user';
 import { useQueryData } from '@gpustack/core-ui';
 import { useAtomValue } from 'jotai';
 import { useCallback } from 'react';
@@ -13,9 +13,11 @@ interface UpdateStorageParams {
 }
 
 export default function useUpdateStorage() {
-  const namespace = getCurrentOrganizationId();
   const currentCluster = useAtomValue(currentClusterAtom);
   const clusterID = currentCluster?.id;
+  // Admin "All" view has no Org context — fall back to the
+  // selected cluster's owner Org slug for the K8s namespace.
+  const namespace = getCurrentOrgNamespace(currentCluster?.owner_principal_id);
 
   const fetchDetail = useCallback(
     (params: UpdateStorageParams, option?: any) =>