You cannot make an assignment to make-to-order stock

What causes this issue?

The component cannot be allocated to an individual stock because
make-to-order production and engineer-to-order production cannot be
executed with this order.
A possible cause is that you are trying to create an order with
reference to a sales-order/project, where an account assignment to a
sales order/project is not allowed in the settlement profile that is
assigned to the chosen order type. This is inconsistant.

System Response

The following responses are possible:
Order processing is cancelled.
The system resets the special stock indicator back to the original
value.

How to fix this error?

Choose another order type.

Error message extract from SAP system. Copyright SAP SE.