Getting an Unexpected critical error trying to Update an Item

[rkhe]

Hi,

I'm having issues with .Ipp.Exception.IdsException: Validation Exception was thrown.Details:Business Validation Error: Unexpected critical error. (-20996). when trying to update an Item. There was no other detail on the exception except it's a Bad Request.

Library version: 14.6.4

Sample request

{
    "Name": "{the-item-name}",
    "Sku": null,
    "Description": null,
    "Active": false,
    "ParentRef": null,
    "FullyQualifiedName": null,
    "Type": 8,
    "PaymentMethodRef": null,
    "UOMSetRef": null,
    "IncomeAccountRef": {
        "name": "Sales Inside",
        "type": null,
        "Value": "{income-account-ref-id}"
    },
    "PurchaseDesc": null,
    "ExpenseAccountRef": null,
    "COGSAccountRef": null,
    "AssetAccountRef": null,
    "PrefVendorRef": null,
    "ManPartNum": null,
    "DepositToAccountRef": null,
    "SalesTaxCodeRef": null,
    "PurchaseTaxCodeRef": null,
    "ItemGroupDetail": null,
    "ItemAssemblyDetail": null,
    "ServiceType": null,
    "ItemCategoryType": "Inventory",
    "ItemEx": null,
    "TaxClassificationRef": null,
    "UQCDisplayText": null,
    "UQCId": null,
    "ClassRef": null,
    "Id": "{quickbooks-id}",
    "SyncToken": "0",
    "MetaData": null,
    "CustomField": null,
    "AttachableRef": null,
    "domain": null,
    "NameAndId": null,
    "Overview": null,
    "HeaderLite": null,
    "HeaderFull": null
}

I'm lost on how to further debug.
Any help is greatly appreciated. Thanks