diff --git a/apps/web/public/static/locales/en/common.json b/apps/web/public/static/locales/en/common.json
index c3892521de..218524b1ff 100644
--- a/apps/web/public/static/locales/en/common.json
+++ b/apps/web/public/static/locales/en/common.json
@@ -2202,6 +2202,7 @@
   "booking_confirmation_failed": "Booking confirmation failed",
   "not_enough_seats": "Not enough seats",
   "form_builder_field_already_exists": "A field with this name already exists",
+  "guests_field_must_be_multiemail": "Guests field must be of type 'Multiple emails'",
   "show_on_booking_page": "Show on booking page",
   "visit_cancelled_booking": "You can visit the canceled booking page",
   "get_started_zapier_templates": "Get started with Zapier templates",
diff --git a/packages/features/form-builder/FormBuilder.test.tsx b/packages/features/form-builder/FormBuilder.test.tsx
index c47efa97a5..1427e1f278 100644
--- a/packages/features/form-builder/FormBuilder.test.tsx
+++ b/packages/features/form-builder/FormBuilder.test.tsx
@@ -1,10 +1,12 @@
 import { TooltipProvider } from "@radix-ui/react-tooltip";
-import { render } from "@testing-library/react";
+import { render, screen, waitFor } from "@testing-library/react";
 import type { ReactNode } from "react";
 import * as React from "react";
 import { FormProvider, useForm } from "react-hook-form";
 import { vi } from "vitest";
 
+import { showToast } from "@calcom/ui/components/toast";
+
 import { FormBuilder } from "./FormBuilder";
 import {
   mockProps,
@@ -32,6 +34,10 @@ vi.mock("next/navigation", async (importOriginal) => {
   };
 });
 
+vi.mock("@calcom/ui/components/toast", () => ({
+  showToast: vi.fn(),
+}));
+
 const renderComponent = ({
   formBuilderProps: formBuilderProps,
   formDefaultValues: formDefaultValues,
@@ -219,7 +225,6 @@ describe("FormBuilder", () => {
         ],
       });
 
-      
       verifier.verifyOptionPrices({ identifier, prices: [20, 25] });
     });
 
@@ -271,4 +276,40 @@ describe("FormBuilder", () => {
       verifier.verifyOptionPrices({ identifier, prices: [50, 75, 100] });
     });
   });
+
+  describe("Guests Field Validation Tests", () => {
+    beforeEach(() => {
+      renderComponent({ formBuilderProps: mockProps, formDefaultValues: {} });
+    });
+
+    it("Should prevent saving guests field with non-multiemail type", async () => {
+      const dialog = pageObject.openAddFieldDialog();
+
+      pageObject.dialog.selectFieldType({ dialog, fieldType: "text" });
+      pageObject.dialog.fillInFieldIdentifier({ dialog, identifier: "guests" });
+      pageObject.dialog.fillInFieldLabel({ dialog, label: "Guests", fieldType: "text" });
+
+      pageObject.dialog.saveField({ dialog });
+
+      await waitFor(() => {
+        expect(showToast).toHaveBeenCalledWith("guests_field_must_be_multiemail", "error");
+      });
+
+      expect(screen.queryByTestId("field-guests")).not.toBeInTheDocument();
+    });
+
+    it("Should allow saving guests field with multiemail type", async () => {
+      const dialog = pageObject.openAddFieldDialog();
+
+      pageObject.dialog.selectFieldType({ dialog, fieldType: "multiemail" });
+      pageObject.dialog.fillInFieldIdentifier({ dialog, identifier: "guests" });
+      pageObject.dialog.fillInFieldLabel({ dialog, label: "Guests", fieldType: "multiemail" });
+
+      pageObject.dialog.saveField({ dialog });
+
+      await waitFor(() => {
+        expect(screen.getByTestId("field-guests")).toBeInTheDocument();
+      });
+    });
+  });
 });
diff --git a/packages/features/form-builder/FormBuilder.tsx b/packages/features/form-builder/FormBuilder.tsx
index 7bbd3aa948..c9b187db71 100644
--- a/packages/features/form-builder/FormBuilder.tsx
+++ b/packages/features/form-builder/FormBuilder.tsx
@@ -380,6 +380,12 @@ export const FormBuilder = function FormBuilder({
           handleSubmit={(data: Parameters<SubmitHandler<RhfFormField>>[0]) => {
             const type = data.type || "text";
             const isNewField = !fieldDialog.data;
+
+            if (data.name === "guests" && type !== "multiemail") {
+              showToast(t("guests_field_must_be_multiemail"), "error");
+              return;
+            }
+
             if (isNewField && fields.some((f) => f.name === data.name)) {
               showToast(t("form_builder_field_already_exists"), "error");
               return;