diff --git a/backend/services/identity-service/prisma/seed.ts b/backend/services/identity-service/prisma/seed.ts
index 38e7a0f5..7616b118 100644
--- a/backend/services/identity-service/prisma/seed.ts
+++ b/backend/services/identity-service/prisma/seed.ts
@@ -51,7 +51,7 @@ const SYSTEM_ACCOUNTS = [
   },
   {
     userId: BigInt(5),
-    accountSequence: 'D25122100000',  // 种子用户 (序号0，真实用户从1开始)
+    accountSequence: 'D25129999999',  // 种子用户 (特殊序号，区别于真实用户)
     nickname: '种子用户',
     referralCode: 'SEED01',
     status: 'ACTIVE',  // 必须是 ACTIVE 才能作为推荐人