diff --git a/src/products/components/ProductStocks/ProductStocks.tsx b/src/products/components/ProductStocks/ProductStocks.tsx
index b1564c0de..84a72acbd 100644
--- a/src/products/components/ProductStocks/ProductStocks.tsx
+++ b/src/products/components/ProductStocks/ProductStocks.tsx
@@ -268,7 +268,7 @@ const ProductStocks: React.FC<ProductStocksProps> = ({
                     {stock.label}
                   </TableCell>
                   <TableCell className={classes.colQuantity}>
-                    {stock.data.quantityAllocated}
+                    {stock.data?.quantityAllocated || 0}
                   </TableCell>
                   <TableCell className={classes.colQuantity}>
                     <TextField
diff --git a/src/products/components/ProductUpdatePage/form.tsx b/src/products/components/ProductUpdatePage/form.tsx
index 8873c597e..fb1be2279 100644
--- a/src/products/components/ProductUpdatePage/form.tsx
+++ b/src/products/components/ProductUpdatePage/form.tsx
@@ -274,7 +274,9 @@ function useProductUpdateForm(
   const handleStockAdd = (id: string) => {
     triggerChange();
     stocks.add({
-      data: null,
+      data: {
+        quantityAllocated: 0
+      },
       id,
       label: opts.warehouses.find(warehouse => warehouse.id === id).name,
       value: "0"
@@ -317,7 +319,6 @@ function useProductUpdateForm(
     ...data,
     ...getStocksData(product, stocks.data),
     ...getMetadata(data, isMetadataModified, isPrivateMetadataModified),
-    addStocks: [],
     attributes: attributes.data,
     attributesWithNewFileValue: attributesWithNewFileValue.data,
     description: description.current
diff --git a/src/products/components/ProductVariantCreatePage/form.tsx b/src/products/components/ProductVariantCreatePage/form.tsx
index bad8c22a9..7e7b669ea 100644
--- a/src/products/components/ProductVariantCreatePage/form.tsx
+++ b/src/products/components/ProductVariantCreatePage/form.tsx
@@ -30,7 +30,7 @@ import { FetchMoreProps, ReorderEvent } from "@saleor/types";
 import useMetadataChangeTrigger from "@saleor/utils/metadata/useMetadataChangeTrigger";
 import React from "react";
 
-import { ProductStockInput } from "../ProductStocks";
+import { ProductStockFormsetData, ProductStockInput } from "../ProductStocks";
 
 export interface ProductVariantCreateFormData extends MetadataFormData {
   sku: string;
@@ -112,7 +112,7 @@ function useProductVariantCreateForm(
   const form = useForm(initial);
   const attributes = useFormset(attributeInput);
   const attributesWithNewFileValue = useFormset<null, File>([]);
-  const stocks = useFormset<null, string>([]);
+  const stocks = useFormset<ProductStockFormsetData, string>([]);
   const channels = useFormset(channelsInput);
   const {
     makeChangeHandler: makeMetadataChangeHandler
@@ -163,7 +163,9 @@ function useProductVariantCreateForm(
   const handleStockAdd = (id: string) => {
     triggerChange();
     stocks.add({
-      data: null,
+      data: {
+        quantityAllocated: 0
+      },
       id,
       label: opts.warehouses.find(warehouse => warehouse.id === id).name,
       value: "0"