Stock still exists for the location/HU/stock item

What causes this issue?

You want to delete a location, a handling unit or a stock item. However,
this stock item is still being used and cannot be deleted.
A stock item can only be deleted if there is zero stock.
A location and a handling unit can only be deleted if you have no
sublocation/subordinate handling unit and no stock quantity.

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?

Display the object contents and, if necessary, book out the stock or
delete the sublocations/subordinate HUs.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.