WM relevance cannot be checked for all the selected orders

What causes this issue?

It could not be determined if the orders you selected are relevant to
WM or not. No evaluation can therefore be carried out for these orders
in regards to WM. The traffic light has been set to "yellow".
This situation can occur when the reservation has neither a warehouse
number nor a storage location. This data is however important for WM.
The WM system connat determine whether the order has errors from the WM
point of view.

How to fix this error?

Check the appropriate reservations.

Error message extract from SAP system. Copyright SAP SE.