diff --git a/backend/services/identity-service/prisma/seed.ts b/backend/services/identity-service/prisma/seed.ts
index 9c7ae700..4f4fe2e3 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: 'S0000000005',  // 种子用户
+    accountSequence: 'D25122100000',  // 种子用户 (序号0，真实用户从1开始)
     nickname: '种子用户',
     referralCode: 'SEED01',
     status: 'SYSTEM',
diff --git a/backend/services/referral-service/prisma/seed.ts b/backend/services/referral-service/prisma/seed.ts
index 1ecf2e69..b4204ced 100644
--- a/backend/services/referral-service/prisma/seed.ts
+++ b/backend/services/referral-service/prisma/seed.ts
@@ -8,7 +8,7 @@ const prisma = new PrismaClient();
 // ============================================
 const SEED_USER = {
   userId: BigInt(5),
-  accountSequence: 'S0000000005',
+  accountSequence: 'D25122100000',  // 种子用户 (序号0，真实用户从1开始)
   myReferralCode: 'SEED01',
   usedReferralCode: null,  // 根节点无推荐人
   referrerId: null,        // 根节点