diff --git a/src/space-model/services/subspace/subspace-model.service.ts b/src/space-model/services/subspace/subspace-model.service.ts
index 57e5652..09cf99b 100644
--- a/src/space-model/services/subspace/subspace-model.service.ts
+++ b/src/space-model/services/subspace/subspace-model.service.ts
@@ -108,7 +108,7 @@ export class SubSpaceModelService {
 
     const addDtos = dtos.filter((dto) => dto.action === ModifyAction.ADD);
     const combinedDtos = dtos.filter((dto) => dto.action !== ModifyAction.ADD);
-    const deleteDtos = dtos.filter((dto) => dto.action !== ModifyAction.DELETE);
+    const deleteDtos = dtos.filter((dto) => dto.action === ModifyAction.DELETE);
 
     const updatedModels = await this.updateSubspaceModel(
       combinedDtos,
@@ -306,8 +306,6 @@ export class SubSpaceModelService {
     for (const dto of dtos) {
       if (!dto.subspaceName) continue;
 
-      await this.checkDuplicateNames(dto.subspaceName, spaceModel.uuid);
-
       const existingSubspace = await queryRunner.manager.findOne(
         this.subspaceModelRepository.target,
         { where: { uuid: dto.uuid } },
@@ -317,6 +315,9 @@ export class SubSpaceModelService {
         existingSubspace &&
         existingSubspace.subspaceName !== dto.subspaceName
       ) {
+        if (existingSubspace.subspaceName !== dto.subspaceName) {
+          await this.checkDuplicateNames(dto.subspaceName, spaceModel.uuid);
+        }
         existingSubspace.subspaceName = dto.subspaceName;
         await queryRunner.manager.save(existingSubspace);
         updatedSubspaces.push({