diff --git a/presence_new/Data/Repository/SQLPresenceRepositoryImpl.cs b/presence_new/Data/Repository/SQLPresenceRepositoryImpl.cs
index 2e13420..92bc1fd 100644
--- a/presence_new/Data/Repository/SQLPresenceRepositoryImpl.cs
+++ b/presence_new/Data/Repository/SQLPresenceRepositoryImpl.cs
@@ -19,14 +19,36 @@ namespace Demo.Data.Repository
 
         public void SavePresence(List<PresenceLocalEntity> presences)
         {
-            _remoteDatabaseContext.PresenceDaos.AddRange(presences.Select(it => new PresenceDao { 
-                Date = DateOnly.FromDateTime(it.Date), 
-                IsAttedance = it.IsAttedance, 
-                LessonNumber = it.LessonNumber,
-                UserGuid = it.UserGuid }));
+            foreach (var presence in presences)
+            {
+                // Проверяем, существует ли запись с указанными датой, пользователем и номером занятия
+                var existing = _remoteDatabaseContext.PresenceDaos.FirstOrDefault(p =>
+                    p.Date == DateOnly.FromDateTime(presence.Date) &&
+                    p.UserGuid == presence.UserGuid &&
+                    p.LessonNumber == presence.LessonNumber);
+
+                if (existing == null)
+                {
+                    // Добавляем запись, если её не существует
+                    _remoteDatabaseContext.PresenceDaos.Add(new PresenceDao
+                    {
+                        Date = DateOnly.FromDateTime(presence.Date),
+                        IsAttedance = presence.IsAttedance,
+                        LessonNumber = presence.LessonNumber,
+                        UserGuid = presence.UserGuid
+                    });
+                }
+                else
+                {
+                    // Обновляем запись, если она уже существует
+                    existing.IsAttedance = presence.IsAttedance;
+                }
+            }
+
+            // Сохраняем все изменения в базе данных
             _remoteDatabaseContext.SaveChanges();
         }
-        
+
         public void AddPresence(PresenceLocalEntity presence)
         {
             if (presence == null) throw new ArgumentNullException(nameof(presence));
diff --git a/presence_new/bin/Debug/net8.0/Demo.dll b/presence_new/bin/Debug/net8.0/Demo.dll
index 8c99645..e183bd9 100644
Binary files a/presence_new/bin/Debug/net8.0/Demo.dll and b/presence_new/bin/Debug/net8.0/Demo.dll differ
diff --git a/presence_new/bin/Debug/net8.0/Demo.exe b/presence_new/bin/Debug/net8.0/Demo.exe
index f2faf2d..29f6e5a 100644
Binary files a/presence_new/bin/Debug/net8.0/Demo.exe and b/presence_new/bin/Debug/net8.0/Demo.exe differ
diff --git a/presence_new/bin/Debug/net8.0/Demo.pdb b/presence_new/bin/Debug/net8.0/Demo.pdb
index edeaa41..c36d382 100644
Binary files a/presence_new/bin/Debug/net8.0/Demo.pdb and b/presence_new/bin/Debug/net8.0/Demo.pdb differ
diff --git a/presence_new/obj/Debug/net8.0/Demo.AssemblyInfo.cs b/presence_new/obj/Debug/net8.0/Demo.AssemblyInfo.cs
index 0e00dd0..6b02f59 100644
--- a/presence_new/obj/Debug/net8.0/Demo.AssemblyInfo.cs
+++ b/presence_new/obj/Debug/net8.0/Demo.AssemblyInfo.cs
@@ -14,7 +14,7 @@ using System.Reflection;
 [assembly: System.Reflection.AssemblyCompanyAttribute("Demo")]
 [assembly: System.Reflection.AssemblyConfigurationAttribute("Debug")]
 [assembly: System.Reflection.AssemblyFileVersionAttribute("1.0.0.0")]
-[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0+a2c399bffd9faab806c32428db650aa0dc6beda0")]
+[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0+f0f13fd99020ad4382d88f0d7ac71fd127a217f9")]
 [assembly: System.Reflection.AssemblyProductAttribute("Demo")]
 [assembly: System.Reflection.AssemblyTitleAttribute("Demo")]
 [assembly: System.Reflection.AssemblyVersionAttribute("1.0.0.0")]
diff --git a/presence_new/obj/Debug/net8.0/Demo.AssemblyInfoInputs.cache b/presence_new/obj/Debug/net8.0/Demo.AssemblyInfoInputs.cache
index 411550b..ed7cb88 100644
--- a/presence_new/obj/Debug/net8.0/Demo.AssemblyInfoInputs.cache
+++ b/presence_new/obj/Debug/net8.0/Demo.AssemblyInfoInputs.cache
@@ -1 +1 @@
-dd902f0088e730c458698a5604cc9ccee9e7331bc32a1270f6f471ef0788085f
+926ddea3ff12cb8f4f0ca8122c04de8f5c0b00ba69e9b8f0048baf56e27cb1cf
diff --git a/presence_new/obj/Debug/net8.0/Demo.GeneratedMSBuildEditorConfig.editorconfig b/presence_new/obj/Debug/net8.0/Demo.GeneratedMSBuildEditorConfig.editorconfig
index 785e987..674a253 100644
--- a/presence_new/obj/Debug/net8.0/Demo.GeneratedMSBuildEditorConfig.editorconfig
+++ b/presence_new/obj/Debug/net8.0/Demo.GeneratedMSBuildEditorConfig.editorconfig
@@ -8,6 +8,6 @@ build_property.PlatformNeutralAssembly =
 build_property.EnforceExtendedAnalyzerRules = 
 build_property._SupportedPlatformList = Linux,macOS,Windows
 build_property.RootNamespace = Demo
-build_property.ProjectDir = C:\Users\class_student\Source\Repos\Mega_New_Presence\presence_new\
+build_property.ProjectDir = C:\Users\class_student\source\repos\Mega_New_Presence\presence_new\
 build_property.EnableComHosting = 
 build_property.EnableGeneratedComInterfaceComImportInterop = 
diff --git a/presence_new/obj/Debug/net8.0/Demo.assets.cache b/presence_new/obj/Debug/net8.0/Demo.assets.cache
index ddd7854..e0783c6 100644
Binary files a/presence_new/obj/Debug/net8.0/Demo.assets.cache and b/presence_new/obj/Debug/net8.0/Demo.assets.cache differ
diff --git a/presence_new/obj/Debug/net8.0/Demo.dll b/presence_new/obj/Debug/net8.0/Demo.dll
index 8c99645..e183bd9 100644
Binary files a/presence_new/obj/Debug/net8.0/Demo.dll and b/presence_new/obj/Debug/net8.0/Demo.dll differ
diff --git a/presence_new/obj/Debug/net8.0/Demo.genruntimeconfig.cache b/presence_new/obj/Debug/net8.0/Demo.genruntimeconfig.cache
index 57822d9..5fedcad 100644
--- a/presence_new/obj/Debug/net8.0/Demo.genruntimeconfig.cache
+++ b/presence_new/obj/Debug/net8.0/Demo.genruntimeconfig.cache
@@ -1 +1 @@
-8bfd3511ab889b8490352355df4ad111bccdd9af0463ad3198e9d919d614764e
+66e4c1bba691035b8d023c5ab70479699ad4d8c58a5e6d5f7ad60ecde8af2bcb
diff --git a/presence_new/obj/Debug/net8.0/Demo.pdb b/presence_new/obj/Debug/net8.0/Demo.pdb
index edeaa41..c36d382 100644
Binary files a/presence_new/obj/Debug/net8.0/Demo.pdb and b/presence_new/obj/Debug/net8.0/Demo.pdb differ
diff --git a/presence_new/obj/Debug/net8.0/apphost.exe b/presence_new/obj/Debug/net8.0/apphost.exe
index f2faf2d..29f6e5a 100644
Binary files a/presence_new/obj/Debug/net8.0/apphost.exe and b/presence_new/obj/Debug/net8.0/apphost.exe differ
diff --git a/presence_new/obj/Debug/net8.0/ref/Demo.dll b/presence_new/obj/Debug/net8.0/ref/Demo.dll
index c4b0631..581da9e 100644
Binary files a/presence_new/obj/Debug/net8.0/ref/Demo.dll and b/presence_new/obj/Debug/net8.0/ref/Demo.dll differ
diff --git a/presence_new/obj/Debug/net8.0/refint/Demo.dll b/presence_new/obj/Debug/net8.0/refint/Demo.dll
index c4b0631..581da9e 100644
Binary files a/presence_new/obj/Debug/net8.0/refint/Demo.dll and b/presence_new/obj/Debug/net8.0/refint/Demo.dll differ
diff --git a/presence_new/obj/Demo.csproj.nuget.dgspec.json b/presence_new/obj/Demo.csproj.nuget.dgspec.json
index c69468e..7e29ddc 100644
--- a/presence_new/obj/Demo.csproj.nuget.dgspec.json
+++ b/presence_new/obj/Demo.csproj.nuget.dgspec.json
@@ -1,20 +1,24 @@
 {
   "format": 1,
   "restore": {
-    "C:\\Users\\class_student\\Source\\Repos\\Mega_New_Presence\\presence_new\\Demo.csproj": {}
+    "C:\\Users\\class_student\\source\\repos\\Mega_New_Presence\\presence_new\\Demo.csproj": {}
   },
   "projects": {
-    "C:\\Users\\class_student\\Source\\Repos\\Mega_New_Presence\\presence_new\\Demo.csproj": {
+    "C:\\Users\\class_student\\source\\repos\\Mega_New_Presence\\presence_new\\Demo.csproj": {
       "version": "1.0.0",
       "restore": {
-        "projectUniqueName": "C:\\Users\\class_student\\Source\\Repos\\Mega_New_Presence\\presence_new\\Demo.csproj",
+        "projectUniqueName": "C:\\Users\\class_student\\source\\repos\\Mega_New_Presence\\presence_new\\Demo.csproj",
         "projectName": "Demo",
-        "projectPath": "C:\\Users\\class_student\\Source\\Repos\\Mega_New_Presence\\presence_new\\Demo.csproj",
+        "projectPath": "C:\\Users\\class_student\\source\\repos\\Mega_New_Presence\\presence_new\\Demo.csproj",
         "packagesPath": "C:\\Users\\class_student\\.nuget\\packages\\",
-        "outputPath": "C:\\Users\\class_student\\Source\\Repos\\Mega_New_Presence\\presence_new\\obj\\",
+        "outputPath": "C:\\Users\\class_student\\source\\repos\\Mega_New_Presence\\presence_new\\obj\\",
         "projectStyle": "PackageReference",
+        "fallbackFolders": [
+          "C:\\Program Files (x86)\\Microsoft Visual Studio\\Shared\\NuGetPackages"
+        ],
         "configFilePaths": [
           "C:\\Users\\class_student\\AppData\\Roaming\\NuGet\\NuGet.Config",
+          "C:\\Program Files (x86)\\NuGet\\Config\\Microsoft.VisualStudio.FallbackLocation.config",
           "C:\\Program Files (x86)\\NuGet\\Config\\Microsoft.VisualStudio.Offline.config"
         ],
         "originalTargetFrameworks": [
diff --git a/presence_new/obj/Demo.csproj.nuget.g.props b/presence_new/obj/Demo.csproj.nuget.g.props
index edb479c..c24b8e3 100644
--- a/presence_new/obj/Demo.csproj.nuget.g.props
+++ b/presence_new/obj/Demo.csproj.nuget.g.props
@@ -5,12 +5,13 @@
     <RestoreTool Condition=" '$(RestoreTool)' == '' ">NuGet</RestoreTool>
     <ProjectAssetsFile Condition=" '$(ProjectAssetsFile)' == '' ">$(MSBuildThisFileDirectory)project.assets.json</ProjectAssetsFile>
     <NuGetPackageRoot Condition=" '$(NuGetPackageRoot)' == '' ">$(UserProfile)\.nuget\packages\</NuGetPackageRoot>
-    <NuGetPackageFolders Condition=" '$(NuGetPackageFolders)' == '' ">C:\Users\class_student\.nuget\packages\</NuGetPackageFolders>
+    <NuGetPackageFolders Condition=" '$(NuGetPackageFolders)' == '' ">C:\Users\class_student\.nuget\packages\;C:\Program Files (x86)\Microsoft Visual Studio\Shared\NuGetPackages</NuGetPackageFolders>
     <NuGetProjectStyle Condition=" '$(NuGetProjectStyle)' == '' ">PackageReference</NuGetProjectStyle>
     <NuGetToolVersion Condition=" '$(NuGetToolVersion)' == '' ">6.9.2</NuGetToolVersion>
   </PropertyGroup>
   <ItemGroup Condition=" '$(ExcludeRestorePackageImports)' != 'true' ">
     <SourceRoot Include="C:\Users\class_student\.nuget\packages\" />
+    <SourceRoot Include="C:\Program Files (x86)\Microsoft Visual Studio\Shared\NuGetPackages\" />
   </ItemGroup>
   <ImportGroup Condition=" '$(ExcludeRestorePackageImports)' != 'true' ">
     <Import Project="$(NuGetPackageRoot)microsoft.entityframeworkcore\8.0.10\buildTransitive\net8.0\Microsoft.EntityFrameworkCore.props" Condition="Exists('$(NuGetPackageRoot)microsoft.entityframeworkcore\8.0.10\buildTransitive\net8.0\Microsoft.EntityFrameworkCore.props')" />
diff --git a/presence_new/obj/project.assets.json b/presence_new/obj/project.assets.json
index 8bdc45a..ee3aab7 100644
--- a/presence_new/obj/project.assets.json
+++ b/presence_new/obj/project.assets.json
@@ -2396,19 +2396,24 @@
     ]
   },
   "packageFolders": {
-    "C:\\Users\\class_student\\.nuget\\packages\\": {}
+    "C:\\Users\\class_student\\.nuget\\packages\\": {},
+    "C:\\Program Files (x86)\\Microsoft Visual Studio\\Shared\\NuGetPackages": {}
   },
   "project": {
     "version": "1.0.0",
     "restore": {
-      "projectUniqueName": "C:\\Users\\class_student\\Source\\Repos\\Mega_New_Presence\\presence_new\\Demo.csproj",
+      "projectUniqueName": "C:\\Users\\class_student\\source\\repos\\Mega_New_Presence\\presence_new\\Demo.csproj",
       "projectName": "Demo",
-      "projectPath": "C:\\Users\\class_student\\Source\\Repos\\Mega_New_Presence\\presence_new\\Demo.csproj",
+      "projectPath": "C:\\Users\\class_student\\source\\repos\\Mega_New_Presence\\presence_new\\Demo.csproj",
       "packagesPath": "C:\\Users\\class_student\\.nuget\\packages\\",
-      "outputPath": "C:\\Users\\class_student\\Source\\Repos\\Mega_New_Presence\\presence_new\\obj\\",
+      "outputPath": "C:\\Users\\class_student\\source\\repos\\Mega_New_Presence\\presence_new\\obj\\",
       "projectStyle": "PackageReference",
+      "fallbackFolders": [
+        "C:\\Program Files (x86)\\Microsoft Visual Studio\\Shared\\NuGetPackages"
+      ],
       "configFilePaths": [
         "C:\\Users\\class_student\\AppData\\Roaming\\NuGet\\NuGet.Config",
+        "C:\\Program Files (x86)\\NuGet\\Config\\Microsoft.VisualStudio.FallbackLocation.config",
         "C:\\Program Files (x86)\\NuGet\\Config\\Microsoft.VisualStudio.Offline.config"
       ],
       "originalTargetFrameworks": [
diff --git a/presence_new/obj/project.nuget.cache b/presence_new/obj/project.nuget.cache
index acf5d9b..35a3095 100644
--- a/presence_new/obj/project.nuget.cache
+++ b/presence_new/obj/project.nuget.cache
@@ -1,8 +1,8 @@
 {
   "version": 2,
-  "dgSpecHash": "5j6Q0wQAgGNgXb7AVtlneZ6ztPd6SxIjaxUAnwEiUSDrqBM9Uhid+TaQlvpxQpbqhuvap8gDUh1InqHMnd0/fg==",
+  "dgSpecHash": "MCQYo+gWP0sRSB7d7cA1aBHHMnk9N2WXV8R5eoe+rfk9u/FbMB9qiuSuvJgyZl7k5rqRp51YEut1IAZqOq/2ng==",
   "success": true,
-  "projectFilePath": "C:\\Users\\class_student\\Source\\Repos\\Mega_New_Presence\\presence_new\\Demo.csproj",
+  "projectFilePath": "C:\\Users\\class_student\\source\\repos\\Mega_New_Presence\\presence_new\\Demo.csproj",
   "expectedPackageFiles": [
     "C:\\Users\\class_student\\.nuget\\packages\\closedxml\\0.104.1\\closedxml.0.104.1.nupkg.sha512",
     "C:\\Users\\class_student\\.nuget\\packages\\closedxml.parser\\1.2.0\\closedxml.parser.1.2.0.nupkg.sha512",