diff --git a/task/src/main/java/com/sdm/task/model/entity/TaskPoolItem.java b/task/src/main/java/com/sdm/task/model/entity/TaskPoolItem.java
index 0b484021..44fc1ef9 100644
--- a/task/src/main/java/com/sdm/task/model/entity/TaskPoolItem.java
+++ b/task/src/main/java/com/sdm/task/model/entity/TaskPoolItem.java
@@ -32,6 +32,8 @@ public class TaskPoolItem extends NodeBase{
 
     public List<TaskPoolPerformance> performances = new ArrayList<>();
 
+    public List<TaskPoolPerformance> children = new ArrayList<>();
+
     public void addTaskExtra(TaskPoolItemExtra extra)
     {
         extras.add(extra);