How to update the items on hand quantity with QuickBooks Online Plus - json

Question

I am using QuickBooks Online Plus, which means i can edit the item. I would like to use the API to change the on hand # for an item. I've created an item "test1" through QuickBooks Online Plus. When i read the item from API i got the following in the attached json file. things looks great as follow:
{
"QueryResponse": {
"Item": [
{
"Name": "test1",
"Active": true,
"FullyQualifiedName": "test1",
"Taxable": false,
"UnitPrice": 3,
"Type": "Inventory",
"IncomeAccountRef": {
"value": "60",
"name": "Sales of Product Income"
},
"PurchaseCost": 1,
"ExpenseAccountRef": {
"value": "61",
"name": "Cost of Goods Sold"
},
"AssetAccountRef": {
"value": "62",
"name": "Inventory Asset"
},
"TrackQtyOnHand": true,
"QtyOnHand": 6,
"InvStartDate": "2015-12-02",
"domain": "QBO",
"sparse": false,
"Id": "19",
"SyncToken": "1",
"MetaData": {
"CreateTime": "2015-12-01T14:38:23-08:00",
"LastUpdatedTime": "2015-12-01T14:38:42-08:00"
}
}
],
"startPosition": 1,
"maxResults": 1
},
"time": "2015-12-02T09:59:29.936-08:00"
}
But when i tried to update that item using the json object below:
{
"Name": "test1",
"Active": true,
"Taxable": false,
"UnitPrice": 3,
"Type": "Inventory",
"IncomeAccountRef": {
"value": "60",
"name": "Sales of Product Income"
},
"PurchaseCost": 1,
"ExpenseAccountRef": {
"value": "61",
"name": "Cost of Goods Sold"
},
"AssetAccountRef": {
"value": "62",
"name": "Inventory Asset"
},
"TrackQtyOnHand": true,
"QtyOnHand": 16,
"InvStartDate": "2015-12-02",
"domain": "QBO",
"sparse": false,
"Id": "19",
"SyncToken": "2"
}
, i got an error like this:
{"Fault":{"Error":[{"Message":"Stale Object Error","Detail":"Stale Object Error : You and seven.li#hotschedules.com were working on this at the same time. seven.li#hotschedules.com finished before you did, so your work was not saved.","code":"5010","element":""}],"type":"ValidationFault"},"time":"2015-12-02T10:42:52.466-08:00"}
I would like to update the on hand quantity. Does anyone know what's wrong and how to do it? Thanks.

Answer 1

The problem is with the "SyncToken". I believe when you try to update the new item, you should not increment the "SyncToken", you should keep it the same. QBO will update the "SyncToken" for you.