diff --git a/apps/gacha/src/app/_components/form/modal-form-register.tsx b/apps/gacha/src/app/_components/form/modal-form-register.tsx
index 8f50e04..5eb5c82 100644
--- a/apps/gacha/src/app/_components/form/modal-form-register.tsx
+++ b/apps/gacha/src/app/_components/form/modal-form-register.tsx
@@ -5,6 +5,7 @@ import { useRegister } from '../../_hooks/use-register';
 import { ControlledInputField } from '@imphnen-frontend-service/ui/organisms';
 import { UseFormReturn } from 'react-hook-form';
 import { TRegisterRequest } from '@imphnen-frontend-service/service';
+import { useEffect } from 'react';
 
 interface IModalFormRegisterProps {
   isOpen: boolean;
@@ -25,6 +26,12 @@ const ModalFormRegister = ({ isOpen, onClose }: IModalFormRegisterProps) => {
     minValue: 1,
   });
 
+  useEffect(() => {
+    if (!isStepOneValid && currentStep === 2) {
+      prevStep();
+    }
+  }, [isStepOneValid, currentStep, prevStep]);
+
   return (
     <Modal
       className="py-[45px] min-w-[400px] lg:min-w-[455px] px-7"