Fix frontend test

Author: erichare

src/frontend/src/utils/reactflowUtils.ts

@@ -451,9 +451,8 @@ export function removeApiKeys(flow: FlowType): FlowType {
       const field = template[key];
 
       if (field.password) {
-        if (key !== "api_key") {
-          field.value = "";
-        }
+        field.value = "";
+        field.load_from_db = false;
       }
 
       // Handle MCP server configurations

src/frontend/tests/assets/outdated_flow.json

@@ -523,7 +523,7 @@
                 "show": true,
                 "title_case": false,
                 "type": "str",
-                "value": "dummy_api_key"
+                "value": ""
               },
               "code": {
                 "advanced": true,