diff --git a/src/space/dtos/update.space.dto.ts b/src/space/dtos/update.space.dto.ts
index 93ff377..0491aa1 100644
--- a/src/space/dtos/update.space.dto.ts
+++ b/src/space/dtos/update.space.dto.ts
@@ -2,6 +2,7 @@ import { ORPHAN_SPACE_NAME } from '@app/common/constants/orphan-constant';
 import { ApiProperty, ApiPropertyOptional } from '@nestjs/swagger';
 import { Type } from 'class-transformer';
 import {
+  ArrayUnique,
   IsArray,
   IsNumber,
   IsOptional,
@@ -49,6 +50,20 @@ export class UpdateSpaceDto {
     description: 'List of subspace modifications',
     type: [UpdateSubspaceDto],
   })
+  @ArrayUnique((subspace) => subspace.subspaceName, {
+    message(validationArguments) {
+      const subspaces = validationArguments.value;
+      const nameCounts = subspaces.reduce((acc, curr) => {
+        acc[curr.subspaceName] = (acc[curr.subspaceName] || 0) + 1;
+        return acc;
+      }, {});
+      // Find duplicates
+      const duplicates = Object.keys(nameCounts).filter(
+        (name) => nameCounts[name] > 1,
+      );
+      return `Duplicate subspace names found: ${duplicates.join(', ')}`;
+    },
+  })
   @IsOptional()
   @IsArray()
   @ValidateNested({ each: true })
diff --git a/src/space/services/space.service.ts b/src/space/services/space.service.ts
index a4e3af7..f0ea822 100644
--- a/src/space/services/space.service.ts
+++ b/src/space/services/space.service.ts
@@ -426,7 +426,7 @@ export class SpaceService {
     }
   }
 
-  async disableSpace(space: SpaceEntity, orphanSpace: SpaceEntity) {
+  private async disableSpace(space: SpaceEntity, orphanSpace: SpaceEntity) {
     await this.commandBus.execute(
       new DisableSpaceCommand({ spaceUuid: space.uuid, orphanSpace }),
     );
diff --git a/src/space/services/subspace/subspace-product-allocation.service.ts b/src/space/services/subspace/subspace-product-allocation.service.ts
index a74823c..4ba7c9c 100644
--- a/src/space/services/subspace/subspace-product-allocation.service.ts
+++ b/src/space/services/subspace/subspace-product-allocation.service.ts
@@ -23,7 +23,7 @@ export class SubspaceProductAllocationService {
     // spaceAllocationsToExclude?: SpaceProductAllocationEntity[],
   ): Promise<void> {
     try {
-      if (!allocationsData.length) return;
+      if (!allocationsData?.length) return;
 
       const allocations: SubspaceProductAllocationEntity[] = [];
 
@@ -112,7 +112,7 @@ export class SubspaceProductAllocationService {
         );
 
         // Create the product-tag mapping based on the processed tags
-        const productTagMapping = subspace.productAllocations.map(
+        const productTagMapping = subspace.productAllocations?.map(
           ({ tagUuid, tagName, productUuid }) => {
             const inputTag = tagUuid
               ? createdTagsByUUID.get(tagUuid)
diff --git a/src/space/services/subspace/subspace.service.ts b/src/space/services/subspace/subspace.service.ts
index d1bf83f..15bda14 100644
--- a/src/space/services/subspace/subspace.service.ts
+++ b/src/space/services/subspace/subspace.service.ts
@@ -39,7 +39,7 @@ export class SubSpaceService {
     private readonly subspaceProductAllocationService: SubspaceProductAllocationService,
   ) {}
 
-  async createSubspaces(
+  private async createSubspaces(
     subspaceData: Array<{
       subspaceName: string;
       space: SpaceEntity;