Handle insufficient stock error

locale/defaultMessages.json

@@ -6645,6 +6645,10 @@
   "src_dot_utils_dot_errors_dot_graphqlError": {
     "string": "API error"
   },
+  "src_dot_utils_dot_errors_dot_insufficientStock": {
+    "context": "error message",
+    "string": "Cannot change the quantity because of insufficient stock"
+  },
   "src_dot_utils_dot_errors_dot_invalid": {
     "string": "Invalid value"
   },

src/orders/views/OrderDetails/OrderDetailsMessages.tsx

@@ -1,6 +1,7 @@
 import messages from "@saleor/containers/BackgroundTasks/messages";
 import useNavigator from "@saleor/hooks/useNavigator";
 import useNotifier from "@saleor/hooks/useNotifier";
+import getOrderErrorMessage from "@saleor/utils/errors/order";
 import createDialogActionHandlers from "@saleor/utils/handlers/dialogActionHandlers";
 import React from "react";
 import { useIntl } from "react-intl";
@@ -205,6 +206,13 @@ export const OrderDetailsMessages: React.FC<OrderDetailsMessages> = ({
           defaultMessage: "Order line updated"
         })
       });
+    } else {
+      errs.forEach(error =>
+        pushMessage({
+          status: "error",
+          text: getOrderErrorMessage(error, intl)
+        })
+      );
     }
   };
   const handleOrderFulfillmentCancel = (data: OrderFulfillmentCancel) => {

src/utils/errors/order.ts

@@ -34,6 +34,10 @@ const messages = defineMessages({
     defaultMessage: "Only pre-authorized payments can be captured",
     description: "error message"
   },
+  insufficientStock: {
+    defaultMessage: "Cannot change the quantity because of insufficient stock",
+    description: "error message"
+  },
   noShippingAddress: {
     defaultMessage:
       "Cannot choose a shipping method for an order without the shipping address",
@@ -79,6 +83,8 @@ function getOrderErrorMessage(
         return intl.formatMessage(commonErrorMessages.graphqlError);
       case OrderErrorCode.INVALID:
         return intl.formatMessage(commonErrorMessages.invalid);
+      case OrderErrorCode.INSUFFICIENT_STOCK:
+        return intl.formatMessage(messages.insufficientStock);
       case OrderErrorCode.NOT_EDITABLE:
         return intl.formatMessage(messages.notEditable);
       case OrderErrorCode.ORDER_NO_SHIPPING_ADDRESS: