diff --git a/yuthon_hr_attendance/models/yuthon_duty_plan.py b/yuthon_hr_attendance/models/yuthon_duty_plan.py
index 1de685f3d..3834a185a 100644
--- a/yuthon_hr_attendance/models/yuthon_duty_plan.py
+++ b/yuthon_hr_attendance/models/yuthon_duty_plan.py
@@ -120,7 +120,7 @@ class YuthonDutyPlan(models.Model):
 
         else:
             i = 0
-            zu = self.zu +1
+            zu = self.zu
             current_date2 = first_day_of_month
             while current_date2 <= last_day_of_month:
                 if zu == len(self.plan_line_ids):