diff --git a/backend/services/identity-service/prisma/migrations/20251220070000_add_system_seed_user/migration.sql b/backend/services/identity-service/prisma/migrations/20251220070000_add_system_seed_user/migration.sql
index 54fa4785..26b68714 100644
--- a/backend/services/identity-service/prisma/migrations/20251220070000_add_system_seed_user/migration.sql
+++ b/backend/services/identity-service/prisma/migrations/20251220070000_add_system_seed_user/migration.sql
@@ -18,7 +18,6 @@ INSERT INTO "user_accounts" (
   "kyc_status",
   "status",
   "registered_at",
-  "created_at",
   "updated_at"
 ) VALUES (
   1,                -- 使用预留的系统账号 ID
@@ -29,7 +28,6 @@ INSERT INTO "user_accounts" (
   'NOT_VERIFIED',
   'ACTIVE',
   NOW(),
-  NOW(),
   NOW()
 ) ON CONFLICT (user_id) DO NOTHING;  -- 如果已存在则跳过