Supply area &1 is assigned to warehouse number &3 in plant &2

What causes this issue?

A warehouse number is assigned to a combination of plant and storage
location in the IM-WM interface. The system uses the production supply
area to determine the storage location.
Due to both of these settings, the system can assign only warehouse
number &V3& for supply area &V1& in plant &V2& in this case.

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?

Use the warehouse number proposed by the system.

Error message extract from SAP system. Copyright SAP SE.