diff --git a/layer-api/src/main/java/org/layer/domain/retrospect/controller/dto/request/RetrospectCreateRequest.java b/layer-api/src/main/java/org/layer/domain/retrospect/controller/dto/request/RetrospectCreateRequest.java
index e1a56502..fa23f07e 100644
--- a/layer-api/src/main/java/org/layer/domain/retrospect/controller/dto/request/RetrospectCreateRequest.java
+++ b/layer-api/src/main/java/org/layer/domain/retrospect/controller/dto/request/RetrospectCreateRequest.java
@@ -20,12 +20,14 @@ public record RetrospectCreateRequest(
 	@NotNull
 	LocalDateTime deadline,
 	@Schema(description = "질문을 수정한 경우 true", example = "true")
-	boolean isNewForm,
+	Boolean isNewForm,
 	@Schema(description = "질문을 수정한 경우, 변경된 폼 이름", example = "변경된 커스텀 폼 제목")
 	String formName,
 	@Schema(description = "질문을 수정한 경우, 변경된 폼 한줄 소개", example = "변경된 커스텀 폼 한줄 소개")
 	String formIntroduction,
 	@Schema(description = "질문을 수정한 경우, 현재 form id", example = "3")
-	Long curFormId
+	Long curFormId,
+	@Schema(description = "질문을 수정한 경우, 현재 form id", example = "true")
+	Boolean hasChangedOriginal
 ) {
 }
diff --git a/layer-api/src/main/java/org/layer/domain/retrospect/service/RetrospectService.java b/layer-api/src/main/java/org/layer/domain/retrospect/service/RetrospectService.java
index 8e51f26f..55040e63 100644
--- a/layer-api/src/main/java/org/layer/domain/retrospect/service/RetrospectService.java
+++ b/layer-api/src/main/java/org/layer/domain/retrospect/service/RetrospectService.java
@@ -72,8 +72,13 @@ public Long createRetrospect(RetrospectCreateRequest request, Long spaceId, Long
 		}
 
 		// 내 회고 폼에 추가
-		Form form = new Form(memberId, spaceId, request.formName(), request.introduction(), FormType.CUSTOM,
-			FormTag.CUSTOM);
+		FormTag formTag = FormTag.CUSTOM;
+		if (!request.hasChangedOriginal()) {
+			Form prevForm = formRepository.findByIdOrThrow(request.curFormId());
+			formTag = prevForm.getFormTag();
+		}
+
+		Form form = new Form(memberId, spaceId, request.formName(), request.introduction(), FormType.CUSTOM, formTag);
 		Form savedForm = formRepository.save(form);
 
 		List<Question> myQuestions = getQuestions(request.questions(), null, savedForm.getId());