diff --git a/apps/api/v2/src/ee/event-types/event-types_2024_06_14/services/input-event-types.service.ts b/apps/api/v2/src/ee/event-types/event-types_2024_06_14/services/input-event-types.service.ts
index c904901e89..879ba789a3 100644
--- a/apps/api/v2/src/ee/event-types/event-types_2024_06_14/services/input-event-types.service.ts
+++ b/apps/api/v2/src/ee/event-types/event-types_2024_06_14/services/input-event-types.service.ts
@@ -252,7 +252,7 @@ export class InputEventTypesService_2024_06_14 {
       requiresConfirmationWillBlockSlot:
         confirmationPolicyTransformed?.requiresConfirmationWillBlockSlot ?? undefined,
       eventTypeColor: this.transformInputEventTypeColor(color),
-      ...this.transformInputSeatOptions(seats),
+      ...(seats ? this.transformInputSeatOptions(seats) : { seatsPerTimeSlot: undefined }),
       eventName: customName,
       useEventTypeDestinationCalendarEmail: useDestinationCalendarEmail,
       ...maxActiveBookingsPerBooker,
diff --git a/apps/api/v2/src/modules/organizations/event-types/organizations-member-team-admin-event-types.e2e-spec.ts b/apps/api/v2/src/modules/organizations/event-types/organizations-member-team-admin-event-types.e2e-spec.ts
index db232ff21f..5558717d14 100644
--- a/apps/api/v2/src/modules/organizations/event-types/organizations-member-team-admin-event-types.e2e-spec.ts
+++ b/apps/api/v2/src/modules/organizations/event-types/organizations-member-team-admin-event-types.e2e-spec.ts
@@ -1230,6 +1230,70 @@ describe("Organizations Event Types Endpoints", () => {
         });
     });
 
+    it("should preserve seatsPerTimeSlot when doing partial update", async () => {
+      const createBody: CreateTeamEventTypeInput_2024_06_14 = {
+        title: "Coding consultation with seats",
+        slug: `organizations-event-types-seats-${randomString()}`,
+        description: "Our team will review your codebase.",
+        lengthInMinutes: 60,
+        locations: [
+          {
+            type: "integration",
+            integration: "cal-video",
+          },
+        ],
+        schedulingType: "COLLECTIVE",
+        hosts: [
+          {
+            userId: teammate1.id,
+          },
+        ],
+        seats: {
+          seatsPerTimeSlot: 5,
+          showAttendeeInfo: true,
+          showAvailabilityCount: true,
+        },
+      };
+
+      const createResponse = await request(app.getHttpServer())
+        .post(`/v2/organizations/${org.id}/teams/${team.id}/event-types`)
+        .send(createBody)
+        .expect(201);
+
+      const createdEventType: TeamEventTypeOutput_2024_06_14 = createResponse.body.data;
+      const createdSeats = createdEventType.seats;
+      expect(createdSeats).toBeDefined();
+      expect(createdSeats && "seatsPerTimeSlot" in createdSeats).toBe(true);
+      if (createdSeats && "seatsPerTimeSlot" in createdSeats) {
+        expect(createdSeats.seatsPerTimeSlot).toEqual(5);
+        expect(createdSeats.showAttendeeInfo).toEqual(true);
+        expect(createdSeats.showAvailabilityCount).toEqual(true);
+      }
+
+      // Now do a partial update that only changes a different field (not seats)
+      const updateBody: UpdateTeamEventTypeInput_2024_06_14 = {
+        bookingRequiresAuthentication: false,
+      };
+
+      const updateResponse = await request(app.getHttpServer())
+        .patch(`/v2/organizations/${org.id}/teams/${team.id}/event-types/${createdEventType.id}`)
+        .send(updateBody)
+        .expect(200);
+
+      const updatedEventType: TeamEventTypeOutput_2024_06_14 = updateResponse.body.data;
+
+      // Verify that seatsPerTimeSlot is preserved and not reset to null
+      const updatedSeats = updatedEventType.seats;
+      expect(updatedSeats).toBeDefined();
+      expect(updatedSeats && "seatsPerTimeSlot" in updatedSeats).toBe(true);
+      if (updatedSeats && "seatsPerTimeSlot" in updatedSeats) {
+        expect(updatedSeats.seatsPerTimeSlot).toEqual(5);
+        expect(updatedSeats.showAttendeeInfo).toEqual(true);
+        expect(updatedSeats.showAvailabilityCount).toEqual(true);
+      }
+      expect(updatedEventType.bookingRequiresAuthentication).toEqual(false);
+    });
+
     function evaluateHost(expected: Host, received: Host | undefined) {
       expect(expected.userId).toEqual(received?.userId);
       expect(expected.mandatory).toEqual(received?.mandatory);