IR before GR not possible for split valuation with valuated special stock

What causes this issue?

You have entered an invoice for a split valuated material. The goods
receipt is still missing for this purchase order item. The purchase
order has an account assignment to a sales order or project which is
managed with valuated special stock.
The posting of the invoice is not possible because the valuation type is
not known.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

You can choose one of the following options:
Post a goods receipt before you post the invoice receipt.
Enter the valuation type into the purchase order item and create the
invoice again.
Hold the invoice document.
Switch to Document Parking and park the invoice document.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.