From 2cbc37c21bbe15392eca7213f77d2eec58c82459 Mon Sep 17 00:00:00 2001
From: Javier Rivero Iglesias <jriveroiglesias@al.uloyola.es>
Date: Fri, 1 May 2026 00:30:55 +0200
Subject: [PATCH 1/2] fix(explore): explain disabled chart overwrite option

---
 .../src/explore/components/SaveModal.test.tsx   |  7 ++++++-
 .../src/explore/components/SaveModal.tsx        | 17 ++++++++++++++++-
 2 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/superset-frontend/src/explore/components/SaveModal.test.tsx b/superset-frontend/src/explore/components/SaveModal.test.tsx
index 1c79be556f5f..6a6be705dd6d 100644
--- a/superset-frontend/src/explore/components/SaveModal.test.tsx
+++ b/superset-frontend/src/explore/components/SaveModal.test.tsx
@@ -255,7 +255,7 @@ test('disables overwrite option for new slice', () => {
 });
 
 test('disables overwrite option for non-owner', () => {
-  const { getByRole } = setup(
+  const { getByRole, getByText } = setup(
     {},
     mockStore({
       ...initialState,
@@ -263,6 +263,11 @@ test('disables overwrite option for non-owner', () => {
     }),
   );
   expect(getByRole('radio', { name: 'Save (Overwrite)' })).toBeDisabled();
+  expect(
+    getByText(
+      'Must be a chart owner to overwrite the existing chart. Save as a new chart instead.',
+    ),
+  ).toBeInTheDocument();
 });
 
 test('updates slice name and selected dashboard', async () => {
diff --git a/superset-frontend/src/explore/components/SaveModal.tsx b/superset-frontend/src/explore/components/SaveModal.tsx
index 6e72769f0780..62503fc77310 100755
--- a/superset-frontend/src/explore/components/SaveModal.tsx
+++ b/superset-frontend/src/explore/components/SaveModal.tsx
@@ -34,6 +34,7 @@ import {
   Loading,
   Divider,
   Flex,
+  Typography,
   TreeSelect,
 } from '@superset-ui/core/components';
 import { logging } from '@apache-superset/core/utils';
@@ -597,18 +598,32 @@ class SaveModal extends Component<SaveModalProps, SaveModalState> {
 
   renderSaveChartModal = () => {
     const info = this.info();
+    const canOverwriteSlice = this.canOverwriteSlice();
+    const isChartOwner = this.props.slice?.owners?.includes(
+      this.props.user.userId,
+    );
+    const isExistingChartNonOwner = Boolean(this.props.slice && !isChartOwner);
     return (
       <Form data-test="save-modal-body" layout="vertical">
         <FormItem data-test="radio-group">
           <Radio
             id="overwrite-radio"
-            disabled={!this.canOverwriteSlice()}
+            disabled={!canOverwriteSlice}
             checked={this.state.action === 'overwrite'}
             onChange={() => this.changeAction('overwrite')}
             data-test="save-overwrite-radio"
           >
             {t('Save (Overwrite)')}
           </Radio>
+          {isExistingChartNonOwner && (
+            <div>
+              <Typography.Text type="secondary">
+                {t(
+                  'Must be a chart owner to overwrite the existing chart. Save as a new chart instead.',
+                )}
+              </Typography.Text>
+            </div>
+          )}
           <Radio
             id="saveas-radio"
             data-test="saveas-radio"

From 7e196be861801924f6ee06c52d22d90e254af139 Mon Sep 17 00:00:00 2001
From: Javier Rivero Iglesias <jriveroiglesias@al.uloyola.es>
Date: Mon, 4 May 2026 23:57:16 +0200
Subject: [PATCH 2/2] Clarify overwrite help text in Explore save modal

---
 .../src/explore/components/SaveModal.test.tsx | 24 ++++++++++++++++++-
 .../src/explore/components/SaveModal.tsx      | 16 ++++++-------
 2 files changed, 31 insertions(+), 9 deletions(-)

diff --git a/superset-frontend/src/explore/components/SaveModal.test.tsx b/superset-frontend/src/explore/components/SaveModal.test.tsx
index 6a6be705dd6d..2265f6d57bd6 100644
--- a/superset-frontend/src/explore/components/SaveModal.test.tsx
+++ b/superset-frontend/src/explore/components/SaveModal.test.tsx
@@ -265,7 +265,29 @@ test('disables overwrite option for non-owner', () => {
   expect(getByRole('radio', { name: 'Save (Overwrite)' })).toBeDisabled();
   expect(
     getByText(
-      'Must be a chart owner to overwrite the existing chart. Save as a new chart instead.',
+      'Must be a chart owner to overwrite this chart. Save as a new chart instead.',
+    ),
+  ).toBeInTheDocument();
+});
+
+test('disables overwrite option for externally managed slice', () => {
+  const { getByRole, getByText } = setup(
+    {},
+    mockStore({
+      ...initialState,
+      explore: {
+        ...initialState.explore,
+        slice: {
+          ...initialState.explore.slice,
+          is_managed_externally: true,
+        },
+      },
+    }),
+  );
+  expect(getByRole('radio', { name: 'Save (Overwrite)' })).toBeDisabled();
+  expect(
+    getByText(
+      "This chart is managed externally and can't be overwritten in Superset.",
     ),
   ).toBeInTheDocument();
 });
diff --git a/superset-frontend/src/explore/components/SaveModal.tsx b/superset-frontend/src/explore/components/SaveModal.tsx
index 62503fc77310..ec1696712715 100755
--- a/superset-frontend/src/explore/components/SaveModal.tsx
+++ b/superset-frontend/src/explore/components/SaveModal.tsx
@@ -599,10 +599,6 @@ class SaveModal extends Component<SaveModalProps, SaveModalState> {
   renderSaveChartModal = () => {
     const info = this.info();
     const canOverwriteSlice = this.canOverwriteSlice();
-    const isChartOwner = this.props.slice?.owners?.includes(
-      this.props.user.userId,
-    );
-    const isExistingChartNonOwner = Boolean(this.props.slice && !isChartOwner);
     return (
       <Form data-test="save-modal-body" layout="vertical">
         <FormItem data-test="radio-group">
@@ -615,12 +611,16 @@ class SaveModal extends Component<SaveModalProps, SaveModalState> {
           >
             {t('Save (Overwrite)')}
           </Radio>
-          {isExistingChartNonOwner && (
+          {this.props.slice && !canOverwriteSlice && (
             <div>
               <Typography.Text type="secondary">
-                {t(
-                  'Must be a chart owner to overwrite the existing chart. Save as a new chart instead.',
-                )}
+                {this.props.slice.is_managed_externally
+                  ? t(
+                      "This chart is managed externally and can't be overwritten in Superset.",
+                    )
+                  : t(
+                      'Must be a chart owner to overwrite this chart. Save as a new chart instead.',
+                    )}
               </Typography.Text>
             </div>
           )}