diff --git a/src/features/providers/sheets/forms/SponsorProviderForm.tsx b/src/features/providers/sheets/forms/SponsorProviderForm.tsx
index 02580d73..bf08187a 100644
--- a/src/features/providers/sheets/forms/SponsorProviderForm.tsx
+++ b/src/features/providers/sheets/forms/SponsorProviderForm.tsx
@@ -20,6 +20,7 @@ import type { ModelInfo } from '@/utils/models';
 import type { ApiKeyFunUsageSummary } from '../../sponsor';
 import {
   discoveryBrandForSponsorProtocol,
+  getSponsorAggregationConflict,
   getSponsorProviderDefinition,
   sponsorProtocolI18nKey,
   sponsorProtocolModelI18nKey,
@@ -410,12 +411,12 @@ function SponsorKeyEntryCard({
     fallbackApiKey: entry.existingApiKey,
     apiKeyEntries: entry.protocol === 'openai' ? openaiDiscoveryEntries : undefined,
   });
-  const protocolOptions = definition.protocols.filter(
-    (protocol) => protocol === entry.protocol || !usedProtocols.has(protocol)
-  ).map((protocol) => ({
-    value: protocol,
-    label: t(`providersPage.sponsor.protocols.${sponsorProtocolI18nKey(protocol)}`),
-  }));
+  const protocolOptions = definition.protocols
+    .filter((protocol) => protocol === entry.protocol || !usedProtocols.has(protocol))
+    .map((protocol) => ({
+      value: protocol,
+      label: t(`providersPage.sponsor.protocols.${sponsorProtocolI18nKey(protocol)}`),
+    }));
 
   const updateEntry = (patch: Partial<SponsorKeyEntryInput>) => {
     onChange({ ...entry, ...patch });
@@ -843,6 +844,18 @@ export function SponsorProviderForm({
   const formClassName = [styles.form, variant === 'quickStart' ? styles.quickStartForm : '']
     .filter(Boolean)
     .join(' ');
+  const aggregationConflict =
+    mode === 'edit'
+      ? getSponsorAggregationConflict(getSponsorRaw(resource, definition.brand))
+      : null;
+
+  if (aggregationConflict) {
+    return (
+      <form id={formId} className={formClassName} onSubmit={(event) => event.preventDefault()}>
+        <div className={styles.errorBox}>{t('providersPage.sponsor.aggregationConflict')}</div>
+      </form>
+    );
+  }
 
   return (
     <form id={formId} className={formClassName} onSubmit={handleSubmit} noValidate>
diff --git a/src/features/providers/sponsorDefinitions.ts b/src/features/providers/sponsorDefinitions.ts
index a4d652f1..ba4451fa 100644
--- a/src/features/providers/sponsorDefinitions.ts
+++ b/src/features/providers/sponsorDefinitions.ts
@@ -35,7 +35,12 @@ import {
   getQiniuCloudProtocolUrls,
   resolveQiniuCloudBaseUrl,
 } from './qiniuCloud';
-import type { ProviderBrand, SponsorProtocol, SponsorProviderBrand } from './types';
+import type {
+  ProviderBrand,
+  SponsorProtocol,
+  SponsorProviderBrand,
+  SponsorProviderRaw,
+} from './types';
 
 export interface SponsorProtocolUrls {
   anthropic: string;
@@ -125,13 +130,31 @@ const SPONSOR_DEFINITIONS: Record<SponsorProviderBrand, SponsorProviderDefinitio
   },
 };
 
-export const isMultiProtocolSponsorBrand = (
-  brand: ProviderBrand
-): brand is SponsorProviderBrand =>
-  brand === 'apikeyFun' ||
-  brand === 'code0' ||
-  brand === 'fennoAI' ||
-  brand === 'qiniuCloud';
+export const isMultiProtocolSponsorBrand = (brand: ProviderBrand): brand is SponsorProviderBrand =>
+  brand === 'apikeyFun' || brand === 'code0' || brand === 'fennoAI' || brand === 'qiniuCloud';
+
+export type SponsorAggregationConflict = 'multiple-configs' | 'multiple-openai-keys';
+
+export const getSponsorAggregationConflict = (
+  raw: SponsorProviderRaw | null | undefined
+): SponsorAggregationConflict | null => {
+  if (!raw) return null;
+  if (
+    raw.openai.length > 1 ||
+    raw.claude.length > 1 ||
+    raw.codex.length > 1 ||
+    raw.gemini.length > 1
+  ) {
+    return 'multiple-configs';
+  }
+
+  const openAIKeyCount = raw.openai.reduce(
+    (count, item) =>
+      count + (item.config.apiKeyEntries ?? []).filter((entry) => entry.apiKey?.trim()).length,
+    0
+  );
+  return openAIKeyCount > 1 ? 'multiple-openai-keys' : null;
+};
 
 export const getSponsorProviderDefinition = (
   brand: SponsorProviderBrand
diff --git a/src/i18n/locales/en.json b/src/i18n/locales/en.json
index 78e980fa..ff4a8293 100644
--- a/src/i18n/locales/en.json
+++ b/src/i18n/locales/en.json
@@ -1357,6 +1357,7 @@
       "usageInvalid": "Invalid key",
       "usageEmpty": "The endpoint returned no usage data.",
       "usageApiKeyRequired": "API key is required",
+      "aggregationConflict": "This grouped provider contains multiple backend configs or OpenAI keys. Edit it in the source configuration to avoid data loss.",
       "groupedKeysTitle": "Grouped keys",
       "groupedKeysHint": "Platform keys may be bound to a group when created. Each grouped key here manages one protocol, and model discovery only uses that protocol.",
       "groupedKey": "Grouped key #{{index}}",
diff --git a/src/i18n/locales/ru.json b/src/i18n/locales/ru.json
index a3e937ef..350771e4 100644
--- a/src/i18n/locales/ru.json
+++ b/src/i18n/locales/ru.json
@@ -1335,6 +1335,7 @@
       "usageInvalid": "Недействительный ключ",
       "usageEmpty": "Endpoint не вернул данные квоты.",
       "usageApiKeyRequired": "Требуется API key",
+      "aggregationConflict": "Этот объединённый провайдер содержит несколько серверных конфигураций или ключей OpenAI. Чтобы избежать потери данных, измените исходную конфигурацию.",
       "groupedKeysTitle": "Групповые ключи",
       "groupedKeysHint": "Ключи платформы могут привязываться к группе при создании. Каждый групповой ключ здесь управляет одним протоколом, а модели загружаются только из этого протокола.",
       "groupedKey": "Групповой ключ #{{index}}",
diff --git a/src/i18n/locales/zh-CN.json b/src/i18n/locales/zh-CN.json
index 14da7145..3a0e5fcd 100644
--- a/src/i18n/locales/zh-CN.json
+++ b/src/i18n/locales/zh-CN.json
@@ -1357,6 +1357,7 @@
       "usageInvalid": "Key 无效",
       "usageEmpty": "端点未返回额度数据",
       "usageApiKeyRequired": "API 密钥必填",
+      "aggregationConflict": "此聚合提供商包含多条后端配置或多个 OpenAI 密钥。为避免数据丢失，请在源码配置中编辑。",
       "groupedKeysTitle": "分组 Key",
       "groupedKeysHint": "平台创建 Key 时可能需要选择分组,这里每个分组 Key 只管理一个协议,模型也只从该协议拉取。",
       "groupedKey": "分组 Key #{{index}}",
diff --git a/src/i18n/locales/zh-TW.json b/src/i18n/locales/zh-TW.json
index 16adaeca..4751668d 100644
--- a/src/i18n/locales/zh-TW.json
+++ b/src/i18n/locales/zh-TW.json
@@ -1383,6 +1383,7 @@
       "usageInvalid": "Key 無效",
       "usageEmpty": "端點未回傳額度資料",
       "usageApiKeyRequired": "API 金鑰必填",
+      "aggregationConflict": "此聚合提供商包含多筆後端設定或多個 OpenAI 金鑰。為避免資料遺失，請在原始碼設定中編輯。",
       "groupedKeysTitle": "分組金鑰",
       "groupedKeysHint": "平台建立 Key 時可能需要選擇分組,這裡每個分組金鑰只管理一個協議,模型也只從該協議拉取。",
       "groupedKey": "分組金鑰 #{{index}}",
diff --git a/tests/sponsorAggregation.test.ts b/tests/sponsorAggregation.test.ts
new file mode 100644
index 00000000..9c6a9a2e
--- /dev/null
+++ b/tests/sponsorAggregation.test.ts
@@ -0,0 +1,55 @@
+import { describe, expect, test } from 'bun:test';
+import { getSponsorAggregationConflict } from '../src/features/providers/sponsorDefinitions';
+import type { SponsorProviderRaw } from '../src/features/providers/types';
+
+const emptyRaw = (): SponsorProviderRaw => ({
+  openai: [],
+  claude: [],
+  codex: [],
+  gemini: [],
+});
+
+describe('sponsor aggregation safety', () => {
+  test('detects multiple configs for one protocol', () => {
+    const raw = emptyRaw();
+    raw.codex = [
+      { index: 0, config: { apiKey: 'first' } },
+      { index: 1, config: { apiKey: 'second' } },
+    ];
+
+    expect(getSponsorAggregationConflict(raw)).toBe('multiple-configs');
+  });
+
+  test('detects multiple OpenAI API keys in one config', () => {
+    const raw = emptyRaw();
+    raw.openai = [
+      {
+        index: 0,
+        config: {
+          name: 'Sponsor',
+          baseUrl: 'https://example.com/v1',
+          apiKeyEntries: [{ apiKey: 'first' }, { apiKey: 'second' }],
+        },
+      },
+    ];
+
+    expect(getSponsorAggregationConflict(raw)).toBe('multiple-openai-keys');
+  });
+
+  test('allows the supported one-config-per-protocol shape', () => {
+    const raw = emptyRaw();
+    raw.codex = [{ index: 0, config: { apiKey: 'codex' } }];
+    raw.openai = [
+      {
+        index: 0,
+        config: {
+          name: 'Sponsor',
+          baseUrl: 'https://example.com/v1',
+          apiKeyEntries: [{ apiKey: 'openai' }],
+        },
+      },
+    ];
+
+    expect(getSponsorAggregationConflict(raw)).toBeNull();
+  });
+});