diff --git a/LangLang/Repositories/SqlRepositories/CourseRepository.cs b/LangLang/Repositories/SqlRepositories/CourseRepository.cs
index 7bb2a67..0052725 100644
--- a/LangLang/Repositories/SqlRepositories/CourseRepository.cs
+++ b/LangLang/Repositories/SqlRepositories/CourseRepository.cs
@@ -1,5 +1,6 @@
 using LangLang.Domain.Models;
 using LangLang.Domain.RepositoryInterfaces;
+using Microsoft.EntityFrameworkCore;
 using System.Collections.Generic;
 using System.Linq;
 
@@ -32,10 +33,17 @@ public void Add(Course course)
 
         public void Update(Course course)
         {
+            var existingCourse = _databaseContext.Course.Find(course.Id);
+            if (existingCourse != null)
+            {
+                _databaseContext.Entry(existingCourse).State = EntityState.Detached;
+            }
+
             _databaseContext.Course.Update(course);
             _databaseContext.SaveChanges();
         }
 
+
         public void Delete(Course course)
         {
             var existingCourse = _databaseContext.Course.Find(course.Id);
diff --git a/LangLang/WPF/Views/TutorView/AdditionalWindows/CourseView/CourseUpdateWindow.xaml.cs b/LangLang/WPF/Views/TutorView/AdditionalWindows/CourseView/CourseUpdateWindow.xaml.cs
index 10b3dce..8dabdfe 100644
--- a/LangLang/WPF/Views/TutorView/AdditionalWindows/CourseView/CourseUpdateWindow.xaml.cs
+++ b/LangLang/WPF/Views/TutorView/AdditionalWindows/CourseView/CourseUpdateWindow.xaml.cs
@@ -21,7 +21,7 @@ public CourseUpdateWindow(Courses parent, Course course)
             CourseUpdateVM = new(course);
             DataContext = CourseUpdateVM;
 
-            languageLvlCb.ItemsSource = Enum.GetValues(typeof(LanguageLevel));
+            languageLvlCb.ItemsSource = Enum.GetValues(typeof(Level));
         }
 
         private void CourseUpdateBtn_Click(object sender, RoutedEventArgs e)
diff --git a/LangLang/WPF/Views/TutorView/Tabs/Courses.xaml.cs b/LangLang/WPF/Views/TutorView/Tabs/Courses.xaml.cs
index 99b91de..60283bd 100644
--- a/LangLang/WPF/Views/TutorView/Tabs/Courses.xaml.cs
+++ b/LangLang/WPF/Views/TutorView/Tabs/Courses.xaml.cs
@@ -63,7 +63,7 @@ private void CourseSearchWindowBtn_Click(object sender, RoutedEventArgs e)
 
         private void CourseUpdateWindowBtn_Click(object sender, RoutedEventArgs e)
         {
-            CoursesViewModel.Update();
+            CoursesViewModel.UpdateCourse();
         }
 
         private void CourseDeleteBtn_Click(object sender, RoutedEventArgs e)