diff --git a/sinch/domains/sms/models/batches/requests.py b/sinch/domains/sms/models/batches/requests.py
index 7554545..99b6cb9 100644
--- a/sinch/domains/sms/models/batches/requests.py
+++ b/sinch/domains/sms/models/batches/requests.py
@@ -100,7 +100,6 @@ class ReplaceBatchRequest(BatchRequest):
     flash_message: bool
     max_number_of_message_parts: int
     udh: str
-    max_number_of_message_parts: int
 
 
 @dataclass