diff --git a/src/main/java/life/mosu/mosuserver/application/auth/processor/SignUpAccountStepProcessor.java b/src/main/java/life/mosu/mosuserver/application/auth/processor/SignUpAccountStepProcessor.java
index 4327f543..fa026aac 100644
--- a/src/main/java/life/mosu/mosuserver/application/auth/processor/SignUpAccountStepProcessor.java
+++ b/src/main/java/life/mosu/mosuserver/application/auth/processor/SignUpAccountStepProcessor.java
@@ -30,13 +30,10 @@ private void validateForNewSignUp(UserJpaEntity user) {
 
         userRepository.findByPhoneNumber(user.getOriginPhoneNumber())
                 .ifPresent(existingUser -> {
-                    if (existingUser.isPendingUser()) {
-                        switch (existingUser.getProvider()) {
-                            case MOSU:
-                                throw new CustomRuntimeException(ErrorCode.USER_ALREADY_EXISTS);
-                            case KAKAO:
-                                throw new CustomRuntimeException(ErrorCode.KAKAO_DUPLICATED);
-                        }
+                    if (existingUser.isKakaoUser()) {
+                        throw new CustomRuntimeException(ErrorCode.KAKAO_DUPLICATED);
+                    } else if (existingUser.isPendingUser() && existingUser.isMosuUser()) {
+                        throw new CustomRuntimeException(ErrorCode.USER_ALREADY_EXISTS);
                     }
                 });
 
diff --git a/src/main/java/life/mosu/mosuserver/domain/user/entity/UserJpaEntity.java b/src/main/java/life/mosu/mosuserver/domain/user/entity/UserJpaEntity.java
index 9afe7ec9..23d9bdda 100644
--- a/src/main/java/life/mosu/mosuserver/domain/user/entity/UserJpaEntity.java
+++ b/src/main/java/life/mosu/mosuserver/domain/user/entity/UserJpaEntity.java
@@ -112,6 +112,10 @@ public void updateUserInfo(
     public boolean isMosuUser() {
         return this.provider.equals(AuthProvider.MOSU);
     }
+    
+    public boolean isKakaoUser() {
+        return this.provider.equals(AuthProvider.KAKAO);
+    }
 
     public boolean isPendingUser() {
         return this.userRole.equals(UserRole.ROLE_PENDING);
diff --git a/src/main/resources/application-base.yml b/src/main/resources/application-base.yml
index 7301ede7..9af75c7e 100644
--- a/src/main/resources/application-base.yml
+++ b/src/main/resources/application-base.yml
@@ -10,6 +10,10 @@ server:
     include-stacktrace: never
 
 spring:
+  threads:
+    virtual:
+      enabled: true
+
   config:
     import:
       - optional:file:.env[.properties]