diff --git a/IceCreamShop/IceCreamShopContracts/BindingModels/OrderBindingModel.cs b/IceCreamShop/IceCreamShopContracts/BindingModels/OrderBindingModel.cs
index b301f05..621fc4b 100644
--- a/IceCreamShop/IceCreamShopContracts/BindingModels/OrderBindingModel.cs
+++ b/IceCreamShop/IceCreamShopContracts/BindingModels/OrderBindingModel.cs
@@ -13,7 +13,7 @@ namespace IceCreamShopContracts.BindingModels
     {
         public int Id { get; set; }
         public int IceCreamId { get; set; }
-		public int ImplementerId { get; set; }
+        public int? ImplementerId { get; set; } = null;
 		public int ClientId { get; set; }
         public int Count { get; set; }
         public double Sum { get; set; }
diff --git a/IceCreamShop/IceCreamShopContracts/ViewModels/OrderViewModel.cs b/IceCreamShop/IceCreamShopContracts/ViewModels/OrderViewModel.cs
index e38f633..b161d62 100644
--- a/IceCreamShop/IceCreamShopContracts/ViewModels/OrderViewModel.cs
+++ b/IceCreamShop/IceCreamShopContracts/ViewModels/OrderViewModel.cs
@@ -16,7 +16,7 @@ namespace IceCreamShopContracts.ViewModels
         public int Id { get; set; }
         public int IceCreamId { get; set; }
         public int ClientId { get; set; }
-        public int ImplementerId { get; set; }
+        public int? ImplementerId { get; set; } = null;
         [DisplayName("Клиент")]
         public string ClientFIO { get; set; } = string.Empty;
         [DisplayName("Мороженное")]
diff --git a/IceCreamShop/IceCreamShopDataModels/IOrderModel.cs b/IceCreamShop/IceCreamShopDataModels/IOrderModel.cs
index 862ec94..bd85d81 100644
--- a/IceCreamShop/IceCreamShopDataModels/IOrderModel.cs
+++ b/IceCreamShop/IceCreamShopDataModels/IOrderModel.cs
@@ -11,7 +11,7 @@ namespace IceCreamShopDataModels.Models
     {
         int IceCreamId { get; }
         int ClientId { get; }
-        int ImplementerId { get; }
+        int? ImplementerId { get; }
         int Count { get; }
         double Sum { get; }
         OrderStatus Status { get; }
diff --git a/IceCreamShop/IceCreamShopDatabaseImplement/Models/Order.cs b/IceCreamShop/IceCreamShopDatabaseImplement/Models/Order.cs
index dab371c..6676f9e 100644
--- a/IceCreamShop/IceCreamShopDatabaseImplement/Models/Order.cs
+++ b/IceCreamShop/IceCreamShopDatabaseImplement/Models/Order.cs
@@ -29,9 +29,9 @@ namespace IceCreamShopDatabaseImplement.Models
         [Required]
         public int ClientId { get; private set; }
         public virtual Client Client { get; private set; }
-		[Required]
-		public int ImplementerId { get; private set; }
-		public virtual Implementer Implementer { get; private set; }
+        [Required]
+        public int? ImplementerId { get; private set; } = null;
+		public virtual Implementer? Implementer { get; private set; }
 		public static Order? Create(IceCreamShopDataBase context, OrderBindingModel model)
         {
             if (model == null)
@@ -78,7 +78,7 @@ namespace IceCreamShopDatabaseImplement.Models
             IceCreamName = IceCream.IceCreamName,
             Id = Id,
             ClientFIO = Client.ClientFIO,
-            ImplementerFIO = Implementer.ImplementerFIO
+            ImplementerFIO = (Implementer != null ? Implementer.ImplementerFIO : string.Empty)
         };
 
     }
diff --git a/IceCreamShop/IceCreamShopFileImplement/Models/Order.cs b/IceCreamShop/IceCreamShopFileImplement/Models/Order.cs
index 1edf86c..f0ac061 100644
--- a/IceCreamShop/IceCreamShopFileImplement/Models/Order.cs
+++ b/IceCreamShop/IceCreamShopFileImplement/Models/Order.cs
@@ -15,7 +15,7 @@ namespace IceCreamShopFileImplement.Models
     {
         public int Id { get; private set; }
         public int IceCreamId { get; private set; }
-		public int ImplementerId { get; private set; }
+        public int? ImplementerId { get; private set; } = null;
 		public int ClientId { get; private set; }
         public int Count { get; private set; }
         public double Sum { get; private set; }
diff --git a/IceCreamShop/IceCreamShopListImplement/Models/Order.cs b/IceCreamShop/IceCreamShopListImplement/Models/Order.cs
index 73b77e8..a337328 100644
--- a/IceCreamShop/IceCreamShopListImplement/Models/Order.cs
+++ b/IceCreamShop/IceCreamShopListImplement/Models/Order.cs
@@ -18,7 +18,7 @@ namespace IceCreamShopListImplement.Models
         public int Id { get; private set; }
         public int IceCreamId { get; private set; }
         public int ClientId { get; private set; }
-		public int ImplementerId { get; private set; }
+		public int? ImplementerId { get; private set; }
 		public int Count { get; private set; }
         public double Sum { get; private set; }
         public OrderStatus Status { get; private set; }