Unable to create requisition line of type "Fixed Price Services"

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Hi, 

As mentioned above, we are not able to create requisition line which is of type "Fixed Price Services" using the create requisition line rest api, please find below payload that we are using testing the rest api. 

Create Requisition Line : "Fixed Price Services", 
URL : https://elcx-test.fa.em2.oraclecloud.com/fscmRestApi/resources/latest/purchaseRequisitions/300000310664186/child/lines
Operation : POST 
Payload: 

{ "LineNumber": 2, 
"LineTypeId": 6, 
"LineTypeCode": "Fixed Price Services", 
"CategoryId": 300000002226680, 
"ItemDescription": "Test1234", 
"CurrencyCode": "SEK", 
"RequesterId": 100000208468161, 
"RequestedDeliveryDate": "2019-08-19", 
"DestinationTypeCode": "EXPENSE", 
"DestinationOrganizationId": 300000009798128, 
"DeliverToLocationId": 300000012877316 
} 

Please find the error that i am getting back as response from rest service 
LineNumber 2: The value of the attribute Line Type is invalid. You can create requisitions only for goods-based lines. (POR-2010817)