diff --git a/AsbCloudApp/Data/WellOperationDto.cs b/AsbCloudApp/Data/WellOperationDto.cs
index c2b18631..310b25d5 100644
--- a/AsbCloudApp/Data/WellOperationDto.cs
+++ b/AsbCloudApp/Data/WellOperationDto.cs
@@ -88,7 +88,7 @@ namespace AsbCloudApp.Data
         /// <summary>
         /// Дата начала операции
         /// </summary>
-        [DateValidation(AllowNull = false)]
+        [DateValidation(GtDate = "2010-01-01T00:00:00")]
         public DateTime DateStart { get; set; }
 
         /// <summary>
diff --git a/AsbCloudWebApi/Controllers/WellOperationController.cs b/AsbCloudWebApi/Controllers/WellOperationController.cs
index 21aec4b5..9d8f8a2a 100644
--- a/AsbCloudWebApi/Controllers/WellOperationController.cs
+++ b/AsbCloudWebApi/Controllers/WellOperationController.cs
@@ -308,7 +308,7 @@ namespace AsbCloudWebApi.Controllers
 
             try
             {
-                wellOperationImportService.Import(idWell, stream, idUser!.Value, (options & 1) > 0);
+                wellOperationImportService.Import(idWell, stream, idUser.Value, (options & 1) > 0);
             }
             catch (FileFormatException ex)
             {