رفع خطای Your target project doesn't match your migrations assembly در انتیتی فریم ورک

درود بر اساتید  ودوستان گرامی
مشکل : از قبل از طریق Code first دیتابیس درست کردم به اسم mig1 و الان برای میخواهم یک ویو مدل درست کنم برای ثبت جدول کاربران  با چند property جدید  به اسم mig2 میگ این خطا را به من میدهد:

Your target project 'WebAutomaiton_system' doesn't match your migrations assembly 'web_Automationsystem.DataModelLayer'. Either change your target project or change your migrations assembly.
Change your migrations assembly by using DbContextOptionsBuilder. E.g. options.UseSqlServer(connection, b => b.MigrationsAssembly("WebAutomaiton_system")). By default, the migrations assembly is the assembly containing the DbContext.
Change your target project to the migrations project by using the Package Manager Console's Default project drop-down list, or by executing "dotnet ef" from the directory containing the migrations project.

دستورات فایل appsetting.json :

{
  "ConnectionStrings": {
    "AutomationConnectionString": "Data Source=.; Initial Catalog=WebAutomationSystemDB;Trusted_Connection=true"
  },

  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft": "Warning",
      "Microsoft.Hosting.Lifetime": "Information"
    }
  },
  "AllowedHosts": "*"
}

کلاس Startup.cs

 public void ConfigureServices(IServiceCollection services)
        {//databaseservice
            services.AddDbContext<ApplicationDbContext>(option=>option.UseSqlServer(Configuration.GetConnectionString("AutomationConnectionString"),
                datamodel =>datamodel.MigrationsAssembly("web_Automationsystem.DataModelLayer")));
            //identityservice
            services.AddIdentity<ApplicationUsers, ApplicationRoles>()
                .AddEntityFrameworkStores<ApplicationDbContext>().AddDefaultTokenProviders();

            services.AddControllersWithViews();