fix quota incentive plan bug with calculate heavy & light value

apps/product/models.py

@@ -480,8 +480,6 @@ class QuotaIncentiveAssignment(BaseModel):
         return f"Quota ({self.quota.id}) for {self.incentive_plan.name}"
 
     def save(self, *args, **kwargs):
-        self.calculate_heavy_value()
-        self.calculate_heavy_value()
         return super(QuotaIncentiveAssignment, self).save(*args, **kwargs)