Allow null value for expiry_date field

src/backend/InvenTree/InvenTree/api_version.py

@@ -1,13 +1,16 @@
 """InvenTree API version information."""
 
 # InvenTree API version
-INVENTREE_API_VERSION = 299
+INVENTREE_API_VERSION = 300
 
 """Increment this API version number whenever there is a significant change to the API that any clients need to know about."""
 
 
 INVENTREE_API_TEXT = """
 
+v300 - 2025-01-13 - https://github.com/inventree/InvenTree/pull/8886
+    - Allow null value for 'expiry_date' field introduced in #8867
+
 v299 - 2025-01-10 - https://github.com/inventree/InvenTree/pull/8867
     - Adds 'expiry_date' field to the PurchaseOrderReceive API endpoint
     - Adds 'default_expiry` field to the PartBriefSerializer, affecting API endpoints which use it

src/backend/InvenTree/order/serializers.py

@@ -770,6 +770,7 @@ def validate_quantity(self, quantity):
         label=_('Expiry Date'),
         help_text=_('Enter expiry date for incoming stock items'),
         required=False,
+        allow_null=True,
         default=None,
     )