diff --git a/core/apps/orders/models/party.py b/core/apps/orders/models/party.py
index eebaeee..71ac129 100644
--- a/core/apps/orders/models/party.py
+++ b/core/apps/orders/models/party.py
@@ -99,8 +99,10 @@ class PartyAmount(BaseModel):
     def save(self, *args, **kwargs):
         if self.calculated_amount < self.paid_amount:
             self.overdue_amount = self.paid_amount - self.calculated_amount
+            self.payment_amount = 0
         elif self.calculated_amount > self.paid_amount:
             self.payment_amount = self.calculated_amount - self.paid_amount
+            self.overdue_amount = 0
         else:
             self.overdue_amount = 0
             self.payment_amount = 0