Purchase Component Method ‘Customer Order’ is not available for Project Deliverables

Hello experts, 

We are going to IFS Cloud from IFS 7.5. We have been using purchase component method ‘Customer Order’ for one of our sites in 7.5. 

Let’s say there is a part which has a component part attached in the project deliverables design, which we need to provide to the supplier. When we create the supply request for the top part and try to create a purchase order from the purchase requisition, we get the following error. 

1. Have you ever encountered this issue?
2. If yes, how did you manage continue the process

In IFS documentation, it doesn’t say anything about such limitation. 

Thanks in advance.