Merge branch 'hotfix/LIL-633' into 'master'

LIL-633

See merge request lilcity/backend!142

apps/payment/models.py

@@ -193,6 +193,7 @@ class CoursePayment(Payment):
         verbose_name_plural = 'Платежи за курсы'
 
     def save(self, *args, **kwargs):
+        if self.status is None:
             amount_data = Payment.calc_amount(course_payment=self)
             self.amount = amount_data.get('amount')
         super().save(*args, **kwargs)
@@ -226,6 +227,7 @@ class SchoolPayment(Payment):
         return days
 
     def save(self, *args, **kwargs):
+        if self.status is None:
             amount_data = Payment.calc_amount(school_payment=self)
             self.amount = amount_data.get('amount')
         super().save(*args, **kwargs)