diff --git a/src/constants/enum.ts b/src/constants/enum.ts
index 8526efc..db6d1e6 100644
--- a/src/constants/enum.ts
+++ b/src/constants/enum.ts
@@ -21,6 +21,7 @@ export const API_ERROR_CODE = {
   INCORRECT_PRIVATE_OPERATIONS: 3303001,
   /** Account not unified margin, update required */
   ACCOUNT_NOT_UNIFIED: 10020,
+  UNKNOWN_ERROR: 12000,
   BALANCE_INSUFFICIENT_SPOT_V3: 12131,
   ORDER_NOT_FOUND_SPOT_V3: 12213,
   ORDER_NOT_FOUND_LEVERAGED_TOKEN: 12407,
diff --git a/test/spot/private.v3.write.test.ts b/test/spot/private.v3.write.test.ts
index 6e9694f..2377bc6 100644
--- a/test/spot/private.v3.write.test.ts
+++ b/test/spot/private.v3.write.test.ts
@@ -73,7 +73,9 @@ describe('Private Spot REST API POST Endpoints', () => {
 
   it('repayCrossMarginLoan()', async () => {
     expect(await api.repayCrossMarginLoan('USDT', '1')).toMatchObject({
-      retCode: API_ERROR_CODE.CROSS_MARGIN_REPAYMENT_NOT_REQUIRED,
+      retCode: API_ERROR_CODE.UNKNOWN_ERROR,
+      // previously:
+      // retCode: API_ERROR_CODE.CROSS_MARGIN_REPAYMENT_NOT_REQUIRED,
     });
   });
 });