diff --git a/app/models/transaction.py b/app/models/transaction.py
index 70b2811..d004621 100644
--- a/app/models/transaction.py
+++ b/app/models/transaction.py
@@ -23,7 +23,7 @@ class Transaction(db.Model):
     @classmethod
     def create_transaction(cls, id, account_id, type, channel):
 
-        if cls.query.filter_by(id=id).first():
+        if cls.query.filter_by(transaction_id=id).first():
             raise ValueError("Duplicate Transaction")
 
         transaction = cls(