diff --git a/src/api/viewService.ts b/src/api/viewService.ts
index 0dcf335..65aa4bc 100644
--- a/src/api/viewService.ts
+++ b/src/api/viewService.ts
@@ -402,7 +402,9 @@ export interface RdbmsLookupResponse {
 }
 
 export interface RdbmsLookupQuery {
-  workflowId: number;
+  // Core-service expects the clone-portable workflow UUID under `workflow_uuid`;
+  // it resolves the numeric workflow_id server-side.
+  workflowUuid: string;
   activityId: string;
   fieldId: string;
   limit?: number;
@@ -412,7 +414,7 @@ export interface RdbmsLookupQuery {
 
 export function fetchRdbmsLookupRecords(templateUuid: string, q: RdbmsLookupQuery): Promise<RdbmsLookupResponse> {
   return request("POST", `/app/${APP_ID}/rdbms-templates/${encodeURIComponent(templateUuid)}/records`, {
-    workflow_id: q.workflowId,
+    workflow_uuid: q.workflowUuid,
     activity_id: q.activityId,
     field_id: q.fieldId,
     limit: q.limit ?? 1000,
diff --git a/src/components/variants/Calendar.tsx b/src/components/variants/Calendar.tsx
index eefd636..ded601b 100644
--- a/src/components/variants/Calendar.tsx
+++ b/src/components/variants/Calendar.tsx
@@ -1,7 +1,7 @@
 import { useEffect, useMemo, useState } from "react";
 import { ChevronLeft, ChevronRight, Phone, X, Calendar as CalendarIcon, Home, Building2 } from "lucide-react";
 import { fetchRdbmsLookupRecords } from "../../api/viewService";
-import { CALENDAR_LOOKUPS, WORKFLOW_NUMERIC_ID, ACTIVITY_IDS, DEFAULT_DEALER_ID } from "../../config";
+import { CALENDAR_LOOKUPS, WORKFLOW_ID, ACTIVITY_IDS, DEFAULT_DEALER_ID } from "../../config";
 
 const ACCENT      = "#e31837";
 const ACCENT_SOFT = "#fde2e8";
@@ -113,7 +113,7 @@ export function CalendarView() {
       let offset = 0;
       for (;;) {
         const resp = await fetchRdbmsLookupRecords(CALENDAR_LOOKUPS.TEST_DRIVES.rdbmsTemplateUuid, {
-          workflowId: WORKFLOW_NUMERIC_ID,
+          workflowUuid: WORKFLOW_ID,
           activityId: ACTIVITY_IDS.INIT_ACTIVITY,
           fieldId: CALENDAR_LOOKUPS.TEST_DRIVES.fieldId,
           limit: PAGE,
@@ -130,13 +130,13 @@ export function CalendarView() {
     Promise.all([
       fetchAllDrives(),
       fetchRdbmsLookupRecords(CALENDAR_LOOKUPS.CARS.rdbmsTemplateUuid, {
-        workflowId: WORKFLOW_NUMERIC_ID,
+        workflowUuid: WORKFLOW_ID,
         activityId: ACTIVITY_IDS.INIT_ACTIVITY,
         fieldId: CALENDAR_LOOKUPS.CARS.fieldId,
         limit: 100,
       }),
       fetchRdbmsLookupRecords(CALENDAR_LOOKUPS.DEALERS.rdbmsTemplateUuid, {
-        workflowId: WORKFLOW_NUMERIC_ID,
+        workflowUuid: WORKFLOW_ID,
         activityId: ACTIVITY_IDS.INIT_ACTIVITY,
         fieldId: CALENDAR_LOOKUPS.DEALERS.fieldId,
         limit: 100,