diff --git a/packages/prisma/extensions/booking-idempotency-key.ts b/packages/prisma/extensions/booking-idempotency-key.ts
index df8e35bb8926c0..3f26a04aad4e0f 100644
--- a/packages/prisma/extensions/booking-idempotency-key.ts
+++ b/packages/prisma/extensions/booking-idempotency-key.ts
@@ -1,54 +1,63 @@
-import { v5 as uuidv5 } from "uuid";
-
-import { Prisma } from "../client";
-import { BookingStatus } from "../enums";
-
-function generateIdempotencyKey({
-  startTime,
-  endTime,
-  userId,
-  reassignedById,
-}: {
-  startTime: Date | string;
-  endTime: Date | string;
-  userId?: number;
-  reassignedById?: number | null;
-}) {
-  return uuidv5(
-    `${startTime.valueOf()}.${endTime.valueOf()}.${userId}${reassignedById ? `.${reassignedById}` : ""}`,
-    uuidv5.URL
-  );
-}
-
-export function bookingIdempotencyKeyExtension() {
-  return Prisma.defineExtension({
-    query: {
-      booking: {
-        async create({ args, query }) {
-          if (args.data.status === BookingStatus.ACCEPTED) {
-            const idempotencyKey = generateIdempotencyKey({
-              startTime: args.data.startTime,
-              endTime: args.data.endTime,
-              userId: args.data.user?.connect?.id,
-              reassignedById: args.data.reassignById,
-            });
-            args.data.idempotencyKey = idempotencyKey;
-          }
-          return query(args);
-        },
-        async update({ args, query }) {
-          if (args.data.status === BookingStatus.CANCELLED || args.data.status === BookingStatus.REJECTED) {
-            args.data.idempotencyKey = null;
-          }
-          return query(args);
-        },
-        async updateMany({ args, query }) {
-          if (args.data.status === BookingStatus.CANCELLED || args.data.status === BookingStatus.REJECTED) {
-            args.data.idempotencyKey = null;
-          }
-          return query(args);
-        },
-      },
-    },
-  });
-}
+import { v5 as uuidv5 } from "uuid";
+
+import { Prisma } from "../client";
+import { BookingStatus } from "../enums";
+
+function generateIdempotencyKey({
+  startTime,
+  endTime,
+  userId,
+  reassignedById,
+}: {
+  startTime: Date | string;
+  endTime: Date | string;
+  userId?: number;
+  reassignedById?: number | null;
+}) {
+  return uuidv5(
+    `${startTime.valueOf()}.${endTime.valueOf()}.${userId}${reassignedById ? `.${reassignedById}` : ""}`,
+    uuidv5.URL
+  );
+}
+
+export function bookingIdempotencyKeyExtension() {
+  return Prisma.defineExtension({
+    query: {
+      booking: {
+        async create({ args, query }) {
+          if (args.data.status === BookingStatus.ACCEPTED) {
+            const idempotencyKey = generateIdempotencyKey({
+              startTime: args.data.startTime,
+              endTime: args.data.endTime,
+              userId: args.data.user?.connect?.id,
+              reassignedById: args.data.reassignedById,
+            });
+            args.data.idempotencyKey = idempotencyKey;
+          }
+          return query(args);
+        },
+        async update({ args, query }) {
+          if (args.data.status === BookingStatus.CANCELLED || args.data.status === BookingStatus.REJECTED) {
+            args.data.idempotencyKey = null;
+          } else if (args.data.status === BookingStatus.ACCEPTED) {
+            if (args.data.startTime && args.data.endTime) {
+              args.data.idempotencyKey = generateIdempotencyKey({
+                startTime: args.data.startTime,
+                endTime: args.data.endTime,
+                userId: args.data.userId ?? args.data.user?.connect?.id,
+                reassignedById: args.data.reassignedById,
+              });
+            }
+          }
+          return query(args);
+        },
+        async updateMany({ args, query }) {
+          if (args.data.status === BookingStatus.CANCELLED || args.data.status === BookingStatus.REJECTED) {
+            args.data.idempotencyKey = null;
+          }
+          return query(args);
+        },
+      },
+    },
+  });
+}