diff --git a/sub_project/models/sub_project.py b/sub_project/models/sub_project.py
index 3a0048a..81a8e68 100755
--- a/sub_project/models/sub_project.py
+++ b/sub_project/models/sub_project.py
@@ -12,6 +12,11 @@ class SubProject(models.Model):
 
     @api.onchange('parent_project', 'sub_project')
     def onchange_parent_project_sub_project(self):
+        user_list = []
+        if self.parent_project.sub_project:
+            user_list = self.parent_project.sub_project.ids
+            user_list.append(self._origin.id)
+            self.parent_project.sub_project = user_list
         if self.sub_project:
             for rec in self.sub_project:
                 #print('AAAAAAAAAAA', rec, rec._origin.id)
@@ -22,6 +27,7 @@ class SubProject(models.Model):
 
 
 
+
 class InheritProjectTask(models.Model):
     _inherit = 'project.task'