diff --git a/src/main/java/kr/re/etri/autoflow/controllers/MinioAttachmentController.java b/src/main/java/kr/re/etri/autoflow/controllers/MinioAttachmentController.java
index 96f3956..e18d0e8 100644
--- a/src/main/java/kr/re/etri/autoflow/controllers/MinioAttachmentController.java
+++ b/src/main/java/kr/re/etri/autoflow/controllers/MinioAttachmentController.java
@@ -196,6 +196,8 @@ public class MinioAttachmentController {
     public ResponseEntity<Map<String, Object>> updateFile(
             @Parameter(description = "기존 첨부파일 ID", required = true)
             @PathVariable("id") Long id,
+            @Parameter(description = "프로젝트 ID", required = true)
+            @RequestParam("projectId") Long projectId,
             @Parameter(description = "새 파일") @RequestPart("file") MultipartFile file,
             @RequestPart(value = "path", required = false) String path,
             @RequestParam(value = "title", required = false) String title,
@@ -204,7 +206,7 @@ public class MinioAttachmentController {
     ) {
         try {
             MinioAttachmentEntity updated = minioAttachmentService.updateFile(
-                    id, file, path, title, description, regUserId
+                    id, projectId, file, path, title, description, regUserId
             );
 
             Map<String, Object> response = new HashMap<>();
diff --git a/src/main/java/kr/re/etri/autoflow/service/MinioAttachmentService.java b/src/main/java/kr/re/etri/autoflow/service/MinioAttachmentService.java
index c351b09..cb6ce1c 100644
--- a/src/main/java/kr/re/etri/autoflow/service/MinioAttachmentService.java
+++ b/src/main/java/kr/re/etri/autoflow/service/MinioAttachmentService.java
@@ -153,6 +153,7 @@ public class MinioAttachmentService {
 
     public MinioAttachmentEntity updateFile(
             Long id,
+            Long projectId, // 추가
             MultipartFile file,
             String path,
             String title,
@@ -190,6 +191,7 @@ public class MinioAttachmentService {
 
         // 새로운 엔티티 생성 (이전 데이터는 그대로 두고, 새로운 버전 생성)
         MinioAttachmentEntity newAttachment = MinioAttachmentEntity.builder()
+                .projectId(projectId) // 추가
                 .refId(existing.getRefId())
                 .refType(existing.getRefType())
                 .originalName(file.getOriginalFilename())
@@ -206,7 +208,6 @@ public class MinioAttachmentService {
         return minioAttachmentRepository.save(newAttachment);
     }
 
-
     /**
      * 생성 (DB만 저장, 파일은 따로 업로드된 경우)
      */