diff --git a/backend/src/main/java/core/services/TaskSeriesService.java b/backend/src/main/java/core/services/TaskSeriesService.java
index 6e555c4..1eb3bcc 100644
--- a/backend/src/main/java/core/services/TaskSeriesService.java
+++ b/backend/src/main/java/core/services/TaskSeriesService.java
@@ -141,21 +141,19 @@ public class TaskSeriesService {
             taskSerie.getTasks().clear();
             taskSeriesRepository.delete(taskSerie);
         } else {
-            repearIndexing(taskSerie);
+            repearIndexing(taskSerie, item.getSeriesIndex());
         }
     }
 
-    private void repearIndexing(TaskSerie taskSerie) {
+    private void repearIndexing(TaskSerie taskSerie, int deletedIndex) {
         taskSerie.getTasks().sort(Comparator.comparingInt(TaskSerieItem::getSeriesIndex));
         List<TaskSerieItem> updatedItems = new ArrayList<>();
-        int currentIndex = 1;
+
         for(TaskSerieItem taskSerieItem : taskSerie.getTasks()) {
-            if(taskSerieItem.getSeriesIndex() != currentIndex) {
-                taskSerieItem.setSeriesIndex(currentIndex);
+            if(taskSerieItem.getSeriesIndex() > deletedIndex) {
+                taskSerieItem.setSeriesIndex(taskSerieItem.getSeriesIndex() -1);
                 updatedItems.add(taskSerieItem);
             }
-
-            currentIndex++;
         }
 
         taskSerieItemRepository.saveAll(updatedItems);