diff --git a/app/Services/CommonService.php b/app/Services/CommonService.php
index 5f59b01..b7cdc16 100644
--- a/app/Services/CommonService.php
+++ b/app/Services/CommonService.php
@@ -9,7 +9,6 @@ use App\Models\CommonModel;
 use CodeIgniter\Database\Exceptions\DatabaseException;
 use CodeIgniter\Validation\Exceptions\ValidationException;
 use RuntimeException;
-use SebastianBergmann\Type\ObjectType;
 
 /**
  * @template TEntity of CommonEntity
@@ -131,7 +130,6 @@ abstract class CommonService
     //CURD 결과처리용
     protected function handle_save_result(mixed $result, int|string $uid): int|string
     {
-        log_message('debug', $this->model->getLastQuery());
         if ($result === false) {
             $errors = $this->model->errors();
             $errorMsg = is_array($errors) ? implode(", ", $errors) : "DB 저장 작업이 실패했습니다.";
@@ -164,6 +162,7 @@ abstract class CommonService
         // INSERT 시 Entity의 PK는 0 또는 NULL이어야 함 (DB가 ID를 생성하도록)
         $initialPK = $entity->getPK();
         $result = $this->model->save($entity);
+        log_message('debug', $this->model->getLastQuery());
         // 최종적으로 DB에 반영된 PK를 반환받습니다. (UPDATE이면 기존 PK, INSERT이면 새 PK)
         $entity->{$this->model->getPKField()} = $this->handle_save_result($result, $initialPK);
         // handle_save_result에서 확인된 최종 PK를 사용하여 DB에서 최신 엔티티를 가져옴
@@ -221,21 +220,24 @@ abstract class CommonService
     //수정용
     protected function modify_process($entity, array $formDatas): object
     {
-        //FormData 검증
+        // 검증
         if (!$this->getFormService()->validate($formDatas)) {
-            throw new ValidationException(implode("\n", service('validation')->getErrors()));
+            throw new ValidationException(
+                implode("\n", service('validation')->getErrors())
+            );
         }
-        //관리자 정보추가용
+        // 관리자 정보 추가
         $formDatas['user_uid'] = $this->getAuthContext()->getUID();
-        // DTO 데이터에서 PK 필드가 있다면 제거하여, fill()에서 기존 PK를 덮어쓰지 않도록 합니다.
+        //PK 추가
         $pkField = $this->model->getPKField();
-        if (isset($formDatas[$pkField])) {
-            unset($formDatas[$pkField]);
+        if (!isset($formDatas[$pkField]) && !empty($entity->getPK())) {
+            // original에 있는 PK 값을 attributes에 명시적으로 복사합니다.
+            $formDatas[$pkField] = $entity->getPK();
         }
-        $entity->merge($formDatas);
-        dd($entity);
+        $entity->fill($formDatas);
         return $this->save_process($entity);
     }
+
     final public function modify(string|int $uid, object $dto): CommonEntity
     {
         $db = \Config\Database::connect();
diff --git a/app/Services/Part/PartService.php b/app/Services/Part/PartService.php
index 3c0d995..661ebc7 100644
--- a/app/Services/Part/PartService.php
+++ b/app/Services/Part/PartService.php
@@ -16,16 +16,12 @@ abstract class PartService extends CommonService
     }
     abstract public function attachToServerPart(ServerPartEntity $serverPartEntity, array $formDatas = []): PartEntity;
     abstract public function detachFromServerPart(ServerPartEntity $serverPartEntity, array $formDatas = []): PartEntity;
-    final protected function updatePart($entity, array $formDatas): PartEntity
+
+    protected function modify_process($entity, array $formDatas): object
     {
-        $updateResult = $this->model->update($entity->getPK(), $formDatas);
-        if ($updateResult === false || $updateResult === 0) {
-            // 업데이트 실패 시 예외 처리
-            $errors = $this->model->errors();
-            $errorMsg = is_array($errors) ? implode(", ", $errors) : "DB 업데이트 실패 또는 변경된 행 없음.";
-            throw new \Exception(__METHOD__ . ": " . $errorMsg);
-        }
-        $entity->merge($formDatas);
-        return $entity;
+        $fields = array_keys($formDatas);
+        $this->getFormService()->setFormFields($fields);
+        $this->getFormService()->setFormRules('modify', $fields);
+        return parent::modify_process($entity, $formDatas);
     }
 }
diff --git a/app/Services/Part/PartType1Service.php b/app/Services/Part/PartType1Service.php
index 9f14c9b..2791ca3 100644
--- a/app/Services/Part/PartType1Service.php
+++ b/app/Services/Part/PartType1Service.php
@@ -25,7 +25,7 @@ abstract class PartType1Service extends PartService
             throw new \Exception("현재 사용가능 갯수[{$entity->getAvailable()}]보다 지정하신 갯수({$serverPartEntity->getCnt()})가 더 많습니다.");
         }
         $formDatas['used'] = $entity->getUsed() + $serverPartEntity->getCnt();
-        return $this->updatePart($entity, $formDatas);
+        return parent::modify_process($entity, $formDatas);
     }
     public function detachFromServerPart(ServerPartEntity $serverPartEntity, array $formDatas = []): PartEntity
     {
@@ -37,6 +37,6 @@ abstract class PartType1Service extends PartService
             throw new \Exception("현재 사용된 갯수[{$entity->getUsed()}]보다 지정하신 갯수({$serverPartEntity->getCnt()})가 더 많습니다.");
         }
         $formDatas['used'] = $entity->getUsed() - $serverPartEntity->getCnt();
-        return $this->updatePart($entity, $formDatas);
+        return parent::modify_process($entity, $formDatas);
     }
 }
diff --git a/app/Services/Part/PartType2Service.php b/app/Services/Part/PartType2Service.php
index ccca07a..62d9d32 100644
--- a/app/Services/Part/PartType2Service.php
+++ b/app/Services/Part/PartType2Service.php
@@ -27,7 +27,7 @@ abstract class PartType2Service extends PartService
             throw new \Exception(__METHOD__ . ":에서 오류발생: {$entity->getTitle()}는 사용중입니다.");
         }
         //파트정보 수정
-        return $this->updatePart($entity, $formDatas);
+        return parent::modify_process($entity, $formDatas);
     }
     public function detachFromServerPart(ServerPartEntity $serverPartEntity, array $formDatas = []): PartEntity
     {
@@ -38,6 +38,6 @@ abstract class PartType2Service extends PartService
         //파트정보가져오기
         $entity = $this->getPartEntityByServerPart($serverPartEntity);
         //파트정보 수정
-        return $this->updatePart($entity, $formDatas);
+        return parent::modify_process($entity, $formDatas);
     }
 }
diff --git a/app/Services/Part/PartType3Service.php b/app/Services/Part/PartType3Service.php
index 8836361..593d5f9 100644
--- a/app/Services/Part/PartType3Service.php
+++ b/app/Services/Part/PartType3Service.php
@@ -26,7 +26,7 @@ abstract class PartType3Service extends PartType2Service
             throw new \Exception(__METHOD__ . ":에서 오류발생: {$entity->getTitle()}는 사용중입니다.");
         }
         //파트정보 수정
-        return $this->updatePart($entity, $formDatas);
+        return parent::modify_process($entity, $formDatas);
     }
 
     public function detachFromServer(ServerEntity $serverEntity, array $formDatas = []): PartEntity
@@ -38,6 +38,6 @@ abstract class PartType3Service extends PartType2Service
         //파트정보가져오기
         $entity = $this->getPartEntityByServer($serverEntity);
         //파트정보 수정
-        return $this->updatePart($entity, $formDatas);
+        return parent::modify_process($entity, $formDatas);
     }
 }