diff --git a/src/main/java/com/back/domain/file/entity/EntityType.java b/src/main/java/com/back/domain/file/entity/EntityType.java
index 9f4bf77a..7bd4785d 100644
--- a/src/main/java/com/back/domain/file/entity/EntityType.java
+++ b/src/main/java/com/back/domain/file/entity/EntityType.java
@@ -1,5 +1,5 @@
 package com.back.domain.file.entity;
 
 public enum EntityType {
-    POST, AVATAR, PROFILE
+    POST, PROFILE, STUDY_ROOM
 }
\ No newline at end of file
diff --git a/src/main/java/com/back/domain/file/repository/AttachmentMappingRepository.java b/src/main/java/com/back/domain/file/repository/AttachmentMappingRepository.java
index b8eefc6d..a0b60f17 100644
--- a/src/main/java/com/back/domain/file/repository/AttachmentMappingRepository.java
+++ b/src/main/java/com/back/domain/file/repository/AttachmentMappingRepository.java
@@ -4,8 +4,11 @@
 import com.back.domain.file.entity.EntityType;
 import org.springframework.data.jpa.repository.JpaRepository;
 
+import java.util.List;
 import java.util.Optional;
 
 public interface AttachmentMappingRepository extends JpaRepository<AttachmentMapping, Long> {
-    Optional<AttachmentMapping> findByEntityTypeAndEntityId(EntityType entityType, Long entityID);
-}
+    List<AttachmentMapping> findAllByEntityTypeAndEntityId(EntityType entityType, Long entityId);
+
+    void deleteAllByEntityTypeAndEntityId(EntityType entityType, Long entityId);
+}
\ No newline at end of file
diff --git a/src/main/resources/application-prod.yml b/src/main/resources/application-prod.yml
index f3091476..9d428429 100644
--- a/src/main/resources/application-prod.yml
+++ b/src/main/resources/application-prod.yml
@@ -74,6 +74,11 @@ spring:
             user-info-uri: https://api.github.com/user
             user-name-attribute: id
 
+  servlet:
+    multipart:
+      max-file-size: 10MB # 업로드할 수 있는 개별 파일의 최대 크기
+      max-request-size: 10MB # 한 요청의 최대 허용 크기
+
   mail:
     host: ${EMAIL_HOST}  # Gmail SMTP 서버 (운영 환경에서는 AWS SES 등으로 변경 권장)
     port: ${EMAIL_PORT}
@@ -86,6 +91,12 @@ spring:
           starttls:
             enable: true
 
+  lifecycle:
+    timeout-per-shutdown-phase: 30s # 종료 대기 시간
+
+server:
+  shutdown: graceful # graceful shutdown 활성화
+
 springdoc:
   default-produces-media-type: application/json;charset=UTF-8