diff --git a/src/backend/InvenTree/stock/api.py b/src/backend/InvenTree/stock/api.py
index 81c9bea06d..74d0b75f39 100644
--- a/src/backend/InvenTree/stock/api.py
+++ b/src/backend/InvenTree/stock/api.py
@@ -1097,6 +1097,10 @@ class StockList(DataExportViewMixin, StockApiMixin, ListCreateDestroyAPIView):
         serializer = self.get_serializer(data=data)
         serializer.is_valid(raise_exception=True)
 
+        # Exclude 'serial' from submitted data
+        # We use 'serial_numbers' for item creation
+        serializer.validated_data.pop('serial', None)
+
         # Extract location information
         location = serializer.validated_data.get('location', None)
 
diff --git a/src/frontend/src/pages/stock/StockDetail.tsx b/src/frontend/src/pages/stock/StockDetail.tsx
index 173512b098..140a644b60 100644
--- a/src/frontend/src/pages/stock/StockDetail.tsx
+++ b/src/frontend/src/pages/stock/StockDetail.tsx
@@ -661,13 +661,25 @@ export default function StockDetail() {
     modalId: 'duplicate-stock-item'
   });
 
+  const duplicateStockData = useMemo(() => {
+    const duplicate = {
+      ...stockitem,
+      serial_numbers: stockitem.serial
+    };
+
+    // Omit the "serial" field for item creation
+    delete duplicate.serial;
+
+    return duplicate;
+  }, [stockitem]);
+
   const duplicateStockItem = useCreateApiFormModal({
     url: ApiEndpoints.stock_item_list,
     title: t`Add Stock Item`,
     modalId: 'duplicate-stock-item',
     fields: duplicateStockItemFields,
     initialData: {
-      ...stockitem
+      ...duplicateStockData
     },
     follow: true,
     modelType: ModelType.stockitem