Rest API to create Sales Order gives error

Summary:

I am trying to create Sales order via /fscmRestApi/resources/11.13.18.05/salesOrdersForOrderHub REST API and getting error as mentioned below

Content (please ensure you mask any confidential information):

Trying to create sales order with below payload

{"SourceTransactionNumber": "OC_04",
"SourceTransactionSystem": "OPS",
"SourceTransactionId": "OC_04",
"SourceTransactionRevisionNumber": 1,
"TransactionalCurrencyName": "US Dollar",
"BusinessUnitName": "MS_GEN_US_USD_BU",
"BuyingPartyName": "Torman Software Inc",
"TransactionOn": "2024-04-16T05:25:36+00:00",
"CustomerPONumber": null,

"RequestingBusinessUnitId": 300000003325003,

"billToCustomer": [

    {

        "PartyName": "Torman Software Inc",

        "AccountNumber": "1001",

        "SiteUseId": 300000006546203

    }

],

"shipToCustomer": [

    {

        "PartyName": "Torman Software Inc",

        "SiteId": 300000006546201

    }

],

"lines": [

    {

        "SourceTransactionLineId": "1",

        "SourceTransactionLineNumber": "1",

        "SourceScheduleNumber": "1",

        "SourceTransactionScheduleId": "1",


        "ProductNumber": "CN92777",

        "OrderedUOMCode": "EA",

        "OrderedQuantity": 1,

        "TransactionCategoryCode": "ORDER",

        "TransactionLineType": "Buy",

        "RequestedShipDate": "2024-04-16T05:25:36+00:00",

        "RequestedFulfillmentOrganizationName": "GEN_US_DIST",


        "billToCustomer": [

            {

                "PartyName": "Torman Software Inc",