diff --git a/app/Http/Controllers/Admin/PlatformOrderController.php b/app/Http/Controllers/Admin/PlatformOrderController.php
index 6ddeb77..534d029 100644
--- a/app/Http/Controllers/Admin/PlatformOrderController.php
+++ b/app/Http/Controllers/Admin/PlatformOrderController.php
@@ -2131,6 +2131,9 @@ class PlatformOrderController extends Controller
             if ((string) ($filters['syncable_only'] ?? '') === '1') {
                 return redirect()->back()->with('warning', '当前已勾选「只看可同步」：该集合与「同步失败」互斥，请先取消只看可同步或切到失败集合后再清理。');
             }
+            if ((string) ($filters['synced_only'] ?? '') === '1') {
+                return redirect()->back()->with('warning', '当前已勾选「只看已同步」：该集合与「同步失败」治理集合无关，请先取消只看已同步或切到失败集合后再清理。');
+            }
         }
 
         $query = PlatformOrder::query()
diff --git a/app/Support/PlatformOrderToolsGuard.php b/app/Support/PlatformOrderToolsGuard.php
index 599e660..4676548 100644
--- a/app/Support/PlatformOrderToolsGuard.php
+++ b/app/Support/PlatformOrderToolsGuard.php
@@ -167,6 +167,10 @@ class PlatformOrderToolsGuard
             return '当前已勾选「只看可同步」：该集合与「同步失败」互斥，请先取消只看可同步或切到失败集合后再清理。';
         }
 
+        if ((string) ($filters['synced_only'] ?? '') === '1') {
+            return '当前已勾选「只看已同步」：该集合与「同步失败」治理集合无关，请先取消只看已同步或切到失败集合后再清理。';
+        }
+
         $hasAnyFailedScope = ($syncStatus === 'failed')
             || ((string) ($filters['fail_only'] ?? '') === '1')
             || (trim((string) ($filters['sync_error_keyword'] ?? '')) !== '');
diff --git a/tests/Feature/AdminPlatformOrderClearSyncErrorsShouldBlockWhenSyncedOnlyTest.php b/tests/Feature/AdminPlatformOrderClearSyncErrorsShouldBlockWhenSyncedOnlyTest.php
new file mode 100644
index 0000000..fe8ea39
--- /dev/null
+++ b/tests/Feature/AdminPlatformOrderClearSyncErrorsShouldBlockWhenSyncedOnlyTest.php
@@ -0,0 +1,78 @@
+<?php
+
+namespace Tests\Feature;
+
+use App\Models\Merchant;
+use App\Models\Plan;
+use App\Models\PlatformOrder;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class AdminPlatformOrderClearSyncErrorsShouldBlockWhenSyncedOnlyTest extends TestCase
+{
+    use RefreshDatabase;
+
+    protected function loginAsPlatformAdmin(): void
+    {
+        $this->seed();
+
+        $this->post('/admin/login', [
+            'email' => 'platform.admin@demo.local',
+            'password' => 'Platform@123456',
+        ])->assertRedirect('/admin');
+    }
+
+    public function test_clear_sync_errors_filtered_should_block_when_synced_only_is_set(): void
+    {
+        $this->loginAsPlatformAdmin();
+
+        $merchant = Merchant::query()->firstOrFail();
+        $plan = Plan::query()->create([
+            'code' => 'clear_sync_err_conflict_synced_only_plan',
+            'name' => '清理同步失败标记冲突（synced_only）测试套餐',
+            'billing_cycle' => 'monthly',
+            'price' => 1,
+            'list_price' => 1,
+            'status' => 'active',
+            'sort' => 10,
+            'published_at' => now(),
+        ]);
+
+        $order = PlatformOrder::query()->create([
+            'merchant_id' => $merchant->id,
+            'plan_id' => $plan->id,
+            'order_no' => 'PO_CLEAR_SYNC_CONFLICT_SYNCED_ONLY_0001',
+            'order_type' => 'new_purchase',
+            'status' => 'pending',
+            'payment_status' => 'unpaid',
+            'plan_name' => $plan->name,
+            'billing_cycle' => $plan->billing_cycle,
+            'period_months' => 1,
+            'quantity' => 1,
+            'payable_amount' => 1,
+            'paid_amount' => 0,
+            'placed_at' => now(),
+            'meta' => [
+                'subscription_activation_error' => [
+                    'message' => '模拟失败',
+                    'at' => now()->toDateTimeString(),
+                    'admin_id' => 1,
+                ],
+                'subscription_activation' => [
+                    'subscription_id' => 999,
+                ],
+            ],
+        ]);
+
+        $this->post('/admin/platform-orders/clear-sync-errors', [
+            'scope' => 'filtered',
+            'synced_only' => '1',
+            'sync_status' => 'failed',
+        ])
+            ->assertRedirect()
+            ->assertSessionHas('warning');
+
+        $order->refresh();
+        $this->assertNotEmpty(data_get($order->meta, 'subscription_activation_error.message'));
+    }
+}
diff --git a/tests/Feature/AdminPlatformOrderIndexClearErrorButtonsShouldDisableWhenNotInFailedScopeTest.php b/tests/Feature/AdminPlatformOrderIndexClearErrorButtonsShouldDisableWhenNotInFailedScopeTest.php
index edee9e9..f05f1cb 100644
--- a/tests/Feature/AdminPlatformOrderIndexClearErrorButtonsShouldDisableWhenNotInFailedScopeTest.php
+++ b/tests/Feature/AdminPlatformOrderIndexClearErrorButtonsShouldDisableWhenNotInFailedScopeTest.php
@@ -58,6 +58,22 @@ class AdminPlatformOrderIndexClearErrorButtonsShouldDisableWhenNotInFailedScopeT
         $this->assertTrue(str_contains($html, 'type="submit" disabled') || str_contains($html, 'disabled="disabled"'));
     }
 
+    public function test_clear_sync_errors_button_should_disable_when_synced_only_checked_even_if_in_failed_scope(): void
+    {
+        $this->loginAsPlatformAdmin();
+
+        $res = $this->get('/admin/platform-orders?sync_status=failed&synced_only=1');
+        $res->assertOk();
+
+        $html = (string) $res->getContent();
+
+        $this->assertStringContainsString('清除同步失败标记（当前筛选范围）', $html);
+        $this->assertStringContainsString('data-role="clear-sync-errors-blocked-hint"', $html);
+        $this->assertStringContainsString('只看已同步', $html);
+
+        $this->assertTrue(str_contains($html, 'type="submit" disabled') || str_contains($html, 'disabled="disabled"'));
+    }
+
     public function test_clear_bmpa_errors_button_should_disable_when_syncable_only_checked_even_if_in_bmpa_failed_scope(): void
     {
         $this->loginAsPlatformAdmin();