diff --git a/src/openapi/fiko/fiko-crud.yaml b/src/openapi/fiko/fiko-crud.yaml
index fe786a7..b51e1ad 100644
--- a/src/openapi/fiko/fiko-crud.yaml
+++ b/src/openapi/fiko/fiko-crud.yaml
@@ -197,8 +197,8 @@ paths:
                 "occurredOn": "2024-10-04T00:00:00Z",
                 "type": "debit",
                 "productCode": "HTM-MND-20",
-                "aggregationReference": "FIKO-123456",
-                "accountingSystemReference": "U4F-123456",
+                "aggregationReference": null,
+                "accountingSystemReference": null,
               }
       responses:
         "201":