diff --git a/yuthon_hr_attendance/models/yuthon_duty_plan.py b/yuthon_hr_attendance/models/yuthon_duty_plan.py
index 15fc8248a..1d3476c8c 100644
--- a/yuthon_hr_attendance/models/yuthon_duty_plan.py
+++ b/yuthon_hr_attendance/models/yuthon_duty_plan.py
@@ -111,7 +111,6 @@ class YuthonDutyPlan(models.Model):
             zu = self.zu +1
             current_date2 = first_day_of_month
             while current_date2 <= last_day_of_month:
-                self.zu = zu
                 if zu == len(self.plan_line_ids):
                     zu = 0
                 for employee in self.plan_line_ids[zu].employee_ids: