diff --git a/app/Http/Controllers/SkinlibController.php b/app/Http/Controllers/SkinlibController.php
index 508c682a..83c24623 100644
--- a/app/Http/Controllers/SkinlibController.php
+++ b/app/Http/Controllers/SkinlibController.php
@@ -249,16 +249,21 @@ class SkinlibController extends Controller
         $hash = hash_file('sha256', $file);
         $hash = $filter->apply('uploaded_texture_hash', $hash, [$file]);
 
-        $duplicated = Texture::where('hash', $hash)->where('public', true)->first();
+        /** @var User */
+        $user = Auth::user();
+
+        $duplicated = Texture::where('hash', $hash)
+            ->where(function ($query) use ($user) {
+                return $query->where('public', true)
+                    ->orWhere('uploader', $user->uid);
+            })
+            ->first();
         if ($duplicated) {
             // if the texture already uploaded was set to private,
             // then allow to re-upload it.
             return json(trans('skinlib.upload.repeated'), 2, ['tid' => $duplicated->tid]);
         }
 
-        /** @var User */
-        $user = Auth::user();
-
         $size = ceil($file->getSize() / 1024);
         $isPublic = is_string($data['public'])
             ? $data['public'] === '1'
@@ -342,6 +347,15 @@ class SkinlibController extends Controller
             return json(trans('skinlib.upload.lack-score'), 1);
         }
 
+        if (!$texture->public) {
+            $duplicated = Texture::where('hash', $texture->hash)
+                ->where('public', true)
+                ->first();
+            if ($duplicated) {
+                return json(trans('skinlib.upload.repeated'), 2, ['tid' => $duplicated->tid]);
+            }
+        }
+
         $dispatcher->dispatch('texture.privacy.updating', [$texture]);
 
         $uploader->score += $score_diff;
diff --git a/resources/assets/src/views/skinlib/Show/index.tsx b/resources/assets/src/views/skinlib/Show/index.tsx
index be746787..ac20be38 100644
--- a/resources/assets/src/views/skinlib/Show/index.tsx
+++ b/resources/assets/src/views/skinlib/Show/index.tsx
@@ -191,12 +191,29 @@ const Show: React.FC = () => {
       return
     }
 
-    const { code, message } = await fetch.put<fetch.ResponseBody>(
+    type Ok = { code: 0; message: string }
+    type Err = { code: 1; message: string }
+    type Duplicated = { code: 2; message: string; data: { tid: number } }
+
+    const resp = await fetch.put<Ok | Err | Duplicated>(
       urls.texture.privacy(texture.tid),
     )
+    const { code, message } = resp
     if (code === 0) {
       toast.success(message)
       setTexture((texture) => ({ ...texture, public: !texture.public }))
+    } else if (resp.code === 2) {
+      try {
+        await showModal({
+          mode: 'confirm',
+          text: message,
+          okButtonText: t('user.viewInSkinlib'),
+        })
+        window.location.href =
+          blessing.base_url + urls.skinlib.show(resp.data.tid)
+      } catch {
+        //
+      }
     } else {
       toast.error(message)
     }
diff --git a/resources/assets/tests/views/skinlib/Show.test.tsx b/resources/assets/tests/views/skinlib/Show.test.tsx
index c3fed242..f8b9029e 100644
--- a/resources/assets/tests/views/skinlib/Show.test.tsx
+++ b/resources/assets/tests/views/skinlib/Show.test.tsx
@@ -575,6 +575,48 @@ describe('change privacy', () => {
     expect(getByRole('alert')).toHaveClass('alert-danger')
     expect(queryByText(t('skinlib.setAsPublic'))).toBeInTheDocument()
   })
+
+  it('duplicated texture with confirmed', async () => {
+    fetch.get.mockResolvedValue({ ...fixtureSkin, public: false })
+    fetch.put.mockResolvedValue({
+      code: 2,
+      message: 'duplicated',
+      data: { tid: 2 },
+    })
+
+    const { getByText, queryByText } = render(<Show />)
+    await waitFor(() => expect(fetch.get).toBeCalledTimes(1))
+
+    fireEvent.click(getByText(t('skinlib.setAsPublic')))
+    fireEvent.click(getByText(t('general.confirm')))
+    await waitFor(() =>
+      expect(fetch.put).toBeCalledWith(urls.texture.privacy(fixtureSkin.tid)),
+    )
+    expect(queryByText('duplicated')).toBeInTheDocument()
+    expect(queryByText(t('skinlib.setAsPublic'))).toBeInTheDocument()
+    fireEvent.click(getByText(t('user.viewInSkinlib')))
+  })
+
+  it('duplicated texture with cancelled', async () => {
+    fetch.get.mockResolvedValue({ ...fixtureSkin, public: false })
+    fetch.put.mockResolvedValue({
+      code: 2,
+      message: 'duplicated',
+      data: { tid: 2 },
+    })
+
+    const { getByText, queryByText } = render(<Show />)
+    await waitFor(() => expect(fetch.get).toBeCalledTimes(1))
+
+    fireEvent.click(getByText(t('skinlib.setAsPublic')))
+    fireEvent.click(getByText(t('general.confirm')))
+    await waitFor(() =>
+      expect(fetch.put).toBeCalledWith(urls.texture.privacy(fixtureSkin.tid)),
+    )
+    expect(queryByText('duplicated')).toBeInTheDocument()
+    expect(queryByText(t('skinlib.setAsPublic'))).toBeInTheDocument()
+    fireEvent.click(getByText(t('general.cancel')))
+  })
 })
 
 describe('delete texture', () => {
diff --git a/resources/misc/changelogs/en/5.1.0.md b/resources/misc/changelogs/en/5.1.0.md
index 8b1ddb53..768acbc1 100644
--- a/resources/misc/changelogs/en/5.1.0.md
+++ b/resources/misc/changelogs/en/5.1.0.md
@@ -5,3 +5,4 @@
 ## Fixed
 
 - Fixed duplicated route names.
+- Fixed duplication of private textures.
diff --git a/resources/misc/changelogs/zh_CN/5.1.0.md b/resources/misc/changelogs/zh_CN/5.1.0.md
index 130777a2..eda36130 100644
--- a/resources/misc/changelogs/zh_CN/5.1.0.md
+++ b/resources/misc/changelogs/zh_CN/5.1.0.md
@@ -5,3 +5,4 @@
 ## 修复
 
 - 修复重复的路由命名
+- 修复私有材质的重复问题
diff --git a/tests/HttpTest/ControllersTest/SkinlibControllerTest.php b/tests/HttpTest/ControllersTest/SkinlibControllerTest.php
index a4f87b83..27dbc326 100644
--- a/tests/HttpTest/ControllersTest/SkinlibControllerTest.php
+++ b/tests/HttpTest/ControllersTest/SkinlibControllerTest.php
@@ -449,6 +449,20 @@ class SkinlibControllerTest extends TestCase
                 'data' => ['tid' => $texture->tid],
             ]);
 
+        // upload a duplicated private texture
+        $texture->uploader = $user->uid;
+        $texture->save();
+        $this->postJson(route('texture.upload'), [
+                'name' => 'texture',
+                'public' => true,
+                'type' => 'steve',
+                'file' => $upload,
+            ])->assertJson([
+                'code' => 2,
+                'message' => trans('skinlib.upload.repeated'),
+                'data' => ['tid' => $texture->tid],
+            ]);
+
         // rejected
         $filter->add('can_upload_texture', function ($can, $file, $name) {
             $this->assertInstanceOf(UploadedFile::class, $file);
@@ -589,6 +603,19 @@ class SkinlibControllerTest extends TestCase
             }
         );
 
+        // duplicated
+        $duplicated = $texture->replicate();
+        $duplicated->uploader = $other->uid;
+        $duplicated->public = true;
+        $duplicated->save();
+        $texture->public = false;
+        $texture->save();
+        $uploader->score = (int) option('private_score_per_storage');
+        $uploader->save();
+        $this->putJson(route('texture.privacy', ['texture' => $texture]))
+            ->assertJson(['code' => 2, 'message' => trans('skinlib.upload.repeated')]);
+        $duplicated->delete();
+
         $this->putJson(route('texture.privacy', ['texture' => $texture]))
             ->assertJson([
                 'code' => 0,