TableOrder API - ERROR_CODE_SELF_ORDER_INVALID_ITEM_PRICE

[Fedias]

Hi team,
We are trying to create a tableorder from API. We have the bellow JSON which we found in swagger.
When we send it without unitPrice, the order is created.
When we need to use the unitPrice, we always receive the error message: ERROR_CODE_SELF_ORDER_INVALID_ITEM_PRICE
We flagged the product Force manual price entry = True but same error.

Any suggestions? 

{

    "tableId": "2",

    "tableAreaId": "Default",

    "comment": "24",

    "items": [

        {

            "id": "10001",

            "quantity": 2.0,

            "unitPrice": 1.1,

            "comment": ""

        }

    ],

    "genericReplacements": []

}