diff --git a/libs/common/src/modules/space-model/entities/subspace-model.entity.ts b/libs/common/src/modules/space-model/entities/subspace-model.entity.ts
index abb1c64..776f831 100644
--- a/libs/common/src/modules/space-model/entities/subspace-model.entity.ts
+++ b/libs/common/src/modules/space-model/entities/subspace-model.entity.ts
@@ -1,9 +1,10 @@
-import { Column, Entity, ManyToOne } from 'typeorm';
+import { Column, Entity, ManyToOne, Unique } from 'typeorm';
 import { AbstractEntity } from '../../abstract/entities/abstract.entity';
 import { SpaceModelEntity } from './space-model.entity';
 import { SubSpaceModelDto } from '../dtos';
 
 @Entity({ name: 'subspace-model' })
+@Unique(['subspaceName', 'spaceModel'])
 export class SubspaceModelEntity extends AbstractEntity<SubSpaceModelDto> {
   @Column({
     type: 'uuid',
diff --git a/src/space-model/dtos/create-space-product-model.dto.ts b/src/space-model/dtos/create-space-product-model.dto.ts
index 63fb9dd..8b98bc6 100644
--- a/src/space-model/dtos/create-space-product-model.dto.ts
+++ b/src/space-model/dtos/create-space-product-model.dto.ts
@@ -1,5 +1,11 @@
 import { ApiProperty } from '@nestjs/swagger';
-import { IsNotEmpty, IsString, IsArray, ValidateNested } from 'class-validator';
+import {
+  IsNotEmpty,
+  IsString,
+  IsArray,
+  ValidateNested,
+  IsInt,
+} from 'class-validator';
 import { Type } from 'class-transformer';
 import { CreateSpaceProductItemModelDto } from './create-space-product-item-model.dto';
 
@@ -17,6 +23,7 @@ export class CreateSpaceProductModelDto {
     example: 3,
   })
   @IsNotEmpty()
+  @IsInt()
   productCount: number;
 
   @ApiProperty({
diff --git a/src/space-model/services/space-model.service.ts b/src/space-model/services/space-model.service.ts
index f7b8f28..37b9ab1 100644
--- a/src/space-model/services/space-model.service.ts
+++ b/src/space-model/services/space-model.service.ts
@@ -36,7 +36,7 @@ export class SpaceModelService {
         );
       }
 
-      const spaceModel = await this.spaceModelRepository.create({
+      const spaceModel = this.spaceModelRepository.create({
         modelName,
         project,
       });
diff --git a/src/space-model/services/space-product-item-model.service.ts b/src/space-model/services/space-product-item-model.service.ts
index ebf7d2d..0a5b43d 100644
--- a/src/space-model/services/space-product-item-model.service.ts
+++ b/src/space-model/services/space-product-item-model.service.ts
@@ -24,6 +24,10 @@ export class SpaceProductItemModelService {
         await this.create(itemModelDto, spaceProductModel, spaceModel);
       }
     } catch (error) {
+      if (error instanceof HttpException) {
+        throw error;
+      }
+
       throw new HttpException(
         error.message || `An unexpected error occurred`,
         HttpStatus.INTERNAL_SERVER_ERROR,
diff --git a/src/space-model/services/space-product-model.service.ts b/src/space-model/services/space-product-model.service.ts
index 10ee9f5..c478dca 100644
--- a/src/space-model/services/space-product-model.service.ts
+++ b/src/space-model/services/space-product-model.service.ts
@@ -24,6 +24,10 @@ export class SpaceProductModelService {
         await this.create(spaceProductModelDto, spaceModel);
       }
     } catch (error) {
+      if (error instanceof HttpException) {
+        throw error;
+      }
+
       throw new HttpException(
         error.message || `An unexpected error occurred`,
         HttpStatus.INTERNAL_SERVER_ERROR,
diff --git a/src/space-model/services/subspace-model.service.ts b/src/space-model/services/subspace-model.service.ts
index 45d33ef..5d4d347 100644
--- a/src/space-model/services/subspace-model.service.ts
+++ b/src/space-model/services/subspace-model.service.ts
@@ -16,6 +16,7 @@ export class SubSpaceModelService {
     spaceModel: SpaceModelEntity,
   ) {
     try {
+      this.validateInputDtos(subSpaceModelDtos);
       for (const subspaceDto of subSpaceModelDtos) {
         const subspace = this.subspaceModelRepository.create({
           subspaceName: subspaceDto.subspaceName,
@@ -24,10 +25,46 @@ export class SubSpaceModelService {
         await this.subspaceModelRepository.save(subspace);
       }
     } catch (error) {
+      if (error instanceof HttpException) {
+        throw error;
+      }
+
       throw new HttpException(
         error.message || `An unexpected error occurred`,
         HttpStatus.INTERNAL_SERVER_ERROR,
       );
     }
   }
+
+  private validateInputDtos(subSpaceModelDtos: CreateSubspaceModelDto[]) {
+    if (subSpaceModelDtos.length === 0) {
+      throw new HttpException(
+        'Subspace models cannot be empty.',
+        HttpStatus.BAD_REQUEST,
+      );
+    }
+
+    const incomingNames = subSpaceModelDtos.map((dto) => dto.subspaceName);
+    this.validateName(incomingNames);
+  }
+
+  private validateName(names: string[]) {
+    const seenNames = new Set<string>();
+    const duplicateNames = new Set<string>();
+
+    for (const name of names) {
+      if (seenNames.has(name)) {
+        duplicateNames.add(name);
+      } else {
+        seenNames.add(name);
+      }
+    }
+
+    if (duplicateNames.size > 0) {
+      throw new HttpException(
+        `Duplicate subspace names found in request: ${[...duplicateNames].join(', ')}`,
+        HttpStatus.CONFLICT,
+      );
+    }
+  }
 }