diff --git a/pennyway-app-external-api/src/main/java/kr/co/pennyway/api/apis/users/service/DeviceTokenUnregisterService.java b/pennyway-app-external-api/src/main/java/kr/co/pennyway/api/apis/users/service/DeviceTokenUnregisterService.java
index 557352566..39b188325 100644
--- a/pennyway-app-external-api/src/main/java/kr/co/pennyway/api/apis/users/service/DeviceTokenUnregisterService.java
+++ b/pennyway-app-external-api/src/main/java/kr/co/pennyway/api/apis/users/service/DeviceTokenUnregisterService.java
@@ -4,9 +4,6 @@
 import kr.co.pennyway.domain.domains.device.exception.DeviceTokenErrorCode;
 import kr.co.pennyway.domain.domains.device.exception.DeviceTokenErrorException;
 import kr.co.pennyway.domain.domains.device.service.DeviceTokenService;
-import kr.co.pennyway.domain.domains.user.domain.User;
-import kr.co.pennyway.domain.domains.user.exception.UserErrorCode;
-import kr.co.pennyway.domain.domains.user.exception.UserErrorException;
 import kr.co.pennyway.domain.domains.user.service.UserService;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
@@ -22,9 +19,7 @@ public class DeviceTokenUnregisterService {
 
     @Transactional
     public void execute(Long userId, String token) {
-        User user = userService.readUser(userId).orElseThrow(() -> new UserErrorException(UserErrorCode.NOT_FOUND));
-
-        DeviceToken deviceToken = deviceTokenService.readDeviceByUserIdAndToken(user.getId(), token).orElseThrow(
+        DeviceToken deviceToken = deviceTokenService.readDeviceByUserIdAndToken(userId, token).orElseThrow(
                 () -> new DeviceTokenErrorException(DeviceTokenErrorCode.NOT_FOUND_DEVICE)
         );
 
diff --git a/pennyway-domain/src/main/java/kr/co/pennyway/domain/domains/device/domain/DeviceToken.java b/pennyway-domain/src/main/java/kr/co/pennyway/domain/domains/device/domain/DeviceToken.java
index 6fa11123b..616377934 100644
--- a/pennyway-domain/src/main/java/kr/co/pennyway/domain/domains/device/domain/DeviceToken.java
+++ b/pennyway-domain/src/main/java/kr/co/pennyway/domain/domains/device/domain/DeviceToken.java
@@ -23,7 +23,7 @@ public class DeviceToken extends DateAuditable {
     @ColumnDefault("true")
     private Boolean activated;
 
-    @ManyToOne(fetch = FetchType.LAZY, cascade = CascadeType.REMOVE)
+    @ManyToOne(fetch = FetchType.LAZY)
     @JoinColumn(name = "user_id")
     private User user;
 
diff --git a/pennyway-domain/src/main/java/kr/co/pennyway/domain/domains/user/domain/User.java b/pennyway-domain/src/main/java/kr/co/pennyway/domain/domains/user/domain/User.java
index dfbc2d179..6bf99ffe3 100644
--- a/pennyway-domain/src/main/java/kr/co/pennyway/domain/domains/user/domain/User.java
+++ b/pennyway-domain/src/main/java/kr/co/pennyway/domain/domains/user/domain/User.java
@@ -4,7 +4,6 @@
 import kr.co.pennyway.domain.common.converter.ProfileVisibilityConverter;
 import kr.co.pennyway.domain.common.converter.RoleConverter;
 import kr.co.pennyway.domain.common.model.DateAuditable;
-import kr.co.pennyway.domain.domains.device.domain.DeviceToken;
 import kr.co.pennyway.domain.domains.user.type.ProfileVisibility;
 import kr.co.pennyway.domain.domains.user.type.Role;
 import lombok.AccessLevel;
@@ -18,8 +17,6 @@
 import org.springframework.util.StringUtils;
 
 import java.time.LocalDateTime;
-import java.util.ArrayList;
-import java.util.List;
 import java.util.Objects;
 
 @Entity
@@ -54,9 +51,6 @@ public class User extends DateAuditable {
     @ColumnDefault("NULL")
     private LocalDateTime deletedAt;
 
-    @OneToMany(mappedBy = "user", fetch = FetchType.LAZY)
-    private List<DeviceToken> deviceTokens = new ArrayList<>();
-
     @Builder
     private User(String username, String name, String password, LocalDateTime passwordUpdatedAt, String profileImageUrl, String phone, Role role,
                  ProfileVisibility profileVisibility, NotifySetting notifySetting, boolean locked) {