diff --git a/src/backend/InvenTree/InvenTree/api_version.py b/src/backend/InvenTree/InvenTree/api_version.py
index a14ba57890..a18e85c2c1 100644
--- a/src/backend/InvenTree/InvenTree/api_version.py
+++ b/src/backend/InvenTree/InvenTree/api_version.py
@@ -1,11 +1,14 @@
 """InvenTree API version information."""
 
 # InvenTree API version
-INVENTREE_API_VERSION = 418
+INVENTREE_API_VERSION = 419
 """Increment this API version number whenever there is a significant change to the API that any clients need to know about."""
 
 INVENTREE_API_TEXT = """
 
+v419 -> 2025-10-24 : https://github.com/inventree/InvenTree/pull/10659
+    - Fixes regression introduced in v417 which reverted the changes from v416
+
 v418 -> 2025-10-24 : https://github.com/inventree/InvenTree/pull/10657
     - Add "project_code" field(s) to OrderLineItem API endpoint(s)
     - Add "project_code" field(s) to ExtraOrderLineItem API endpoint(s)
diff --git a/src/backend/InvenTree/part/serializers.py b/src/backend/InvenTree/part/serializers.py
index 681cd5a507..16e7d364d0 100644
--- a/src/backend/InvenTree/part/serializers.py
+++ b/src/backend/InvenTree/part/serializers.py
@@ -1042,7 +1042,9 @@ class PartSerializer(
     )
 
     price_breaks = enable_filter(
-        PartSalePriceSerializer(source='salepricebreaks', many=True, read_only=True),
+        PartSalePriceSerializer(
+            source='salepricebreaks', many=True, read_only=True, allow_null=True
+        ),
         False,
         filter_name='price_breaks',
     )