Close position: "validation.null-not-allowed.request"

[skattverket]

Can't figure out this error when i try to close a position to /positions/otc. Creating a position works fine.

validation.null-not-allowed.request

This is what I send

        payload = {
            "dealId": "DIAAAAVNXSSLHA3",
            "direction": "SELL",
            "size": 50.0,
            "orderType": "MARKET",
            "timeInForce": "EXECUTE_AND_ELIMINATE"
        }

I exclude the fields not necessary but IG picks them up anyway and set them to null somehow.

I have also tried to send varations of these but without luck:

epic
expiry
quote_id
level
currencycode