diff --git a/hr_payroll/models/hr_salary_rule_category.py b/hr_payroll/models/hr_salary_rule_category.py
index bd01701..ee2303a 100644
--- a/hr_payroll/models/hr_salary_rule_category.py
+++ b/hr_payroll/models/hr_salary_rule_category.py
@@ -22,7 +22,7 @@ class HrSalaryRuleCategory(models.Model):
             raise ValidationError(_('Error! You cannot create recursive hierarchy of Salary Rule Category.'))
 
     def _sum_salary_rule_category(self, localdict, amount):
-        self.ensure_one()
+        # self.ensure_one()
         if self.parent_id:
             localdict = self.parent_id._sum_salary_rule_category(localdict, amount)
         localdict['categories'][self.code] = localdict['categories'][self.code] + amount