diff --git a/lib/features/timetable_page/managers/timetable_lessons_manager.dart b/lib/features/timetable_page/managers/timetable_lessons_manager.dart
index 9dd4d3c..5ba3aaa 100644
--- a/lib/features/timetable_page/managers/timetable_lessons_manager.dart
+++ b/lib/features/timetable_page/managers/timetable_lessons_manager.dart
@@ -94,10 +94,6 @@ class TimetableLessonsManager {
   void _setLessons(List<LessonFullNamesInDb> lessons) {
     TimetableLessons timetableMap = SplayTreeMap.of(timetable.state.cast());
 
-    for (final lesson in lessons) {
-      timetableMap[lesson.date] = [];
-    }
-
     for (int i = 0; i < lessons.length; i++) {
       final lesson = lessons[i];
       int emptyLessonsBefore = 0;