diff --git a/python/educational-core/student/src/com/jetbrains/edu/learning/courseGeneration/StudyProjectGenerator.java b/python/educational-core/student/src/com/jetbrains/edu/learning/courseGeneration/StudyProjectGenerator.java
index 2169032449f7..69c870108e78 100644
--- a/python/educational-core/student/src/com/jetbrains/edu/learning/courseGeneration/StudyProjectGenerator.java
+++ b/python/educational-core/student/src/com/jetbrains/edu/learning/courseGeneration/StudyProjectGenerator.java
@@ -329,6 +329,10 @@ public class StudyProjectGenerator {
    */
   @SuppressWarnings("IOResourceOpenedButNotSafelyClosed")
   public static void flushCache(List<CourseInfo> courses) {
+    flushCache(courses, true);
+  }
+
+  public static void flushCache(List<CourseInfo> courses, boolean preserveOld) {
     File cacheFile = new File(OUR_COURSES_DIR, CACHE_NAME);
     PrintWriter writer = null;
     try {
@@ -337,7 +341,9 @@ public class StudyProjectGenerator {
 
       final Set<CourseInfo> courseInfos = new HashSet<>();
       courseInfos.addAll(courses);
-      courseInfos.addAll(getCoursesFromCache());
+      if (preserveOld) {
+        courseInfos.addAll(getCoursesFromCache());
+      }
 
       writer = new PrintWriter(cacheFile);
       for (CourseInfo courseInfo : courseInfos) {
diff --git a/python/educational-core/student/src/com/jetbrains/edu/learning/ui/StudyNewProjectPanel.java b/python/educational-core/student/src/com/jetbrains/edu/learning/ui/StudyNewProjectPanel.java
index f013d0343bef..d01c6d1eb4f6 100644
--- a/python/educational-core/student/src/com/jetbrains/edu/learning/ui/StudyNewProjectPanel.java
+++ b/python/educational-core/student/src/com/jetbrains/edu/learning/ui/StudyNewProjectPanel.java
@@ -270,7 +270,7 @@ public class StudyNewProjectPanel extends JPanel implements PanelWithAnchor {
 
     myGenerator.setCourses(courses);
     myAvailableCourses = courses;
-    StudyProjectGenerator.flushCache(myAvailableCourses);
+    StudyProjectGenerator.flushCache(myAvailableCourses, false);
   }
 
   private void addCoursesToCombobox(@NotNull List<CourseInfo> courses) {