Creating a project production order with a consumed posting type is not allowed because a costing sheet exists

Creating a project production order with a consumed posting type should be allowed even though the costing sheet exists.

Below is the scenario

According to IFRS and POC if we have a production order lasting 24 months, and each month we consume raw material, overhead, hours, they have to go into costs so that with POC logic (%complete) 

We can achieve a revenue. If we can’t use posting method consumed, we stay 23 months with 0 costs and 0 revenues and then, when machine is reported as finished and so basically invoiced, I have all my costs and so my revenue.

This is not correct for an accounting perspective.