diff --git a/src/CMSMicroservice.Application/UserOrderCQ/Commands/CreateNewUserOrder/CreateNewUserOrderCommandHandler.cs b/src/CMSMicroservice.Application/UserOrderCQ/Commands/CreateNewUserOrder/CreateNewUserOrderCommandHandler.cs
index 3289faf..a9188be 100644
--- a/src/CMSMicroservice.Application/UserOrderCQ/Commands/CreateNewUserOrder/CreateNewUserOrderCommandHandler.cs
+++ b/src/CMSMicroservice.Application/UserOrderCQ/Commands/CreateNewUserOrder/CreateNewUserOrderCommandHandler.cs
@@ -12,6 +12,9 @@ public class CreateNewUserOrderCommandHandler : IRequestHandler<CreateNewUserOrd
     public async Task<CreateNewUserOrderResponseDto> Handle(CreateNewUserOrderCommand request,
         CancellationToken cancellationToken)
     {
+        if (await _context.UserOrders.AnyAsync(x => x.UserId == request.UserId && x.PackageId == request.PackageId, cancellationToken: cancellationToken))
+            throw new Exception(message: "duplicate order!!");
+
         var entity = request.Adapt<UserOrder>();
         await _context.UserOrders.AddAsync(entity, cancellationToken);
         entity.AddDomainEvent(new CreateNewUserOrderEvent(entity));