Entered storage unit & is a lower-level HU

What causes this issue?

The storage unit you entered is a lower-level handling unit.
Within WM, only processing of higher-level handling units is possible.

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?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.