Unable to lock setting &1 exclusively

What causes this issue?

You have changed the the broadcast setting.
This setting could not be locked exclusively against changes by other
users or processes on the SAP BW server however. The most common reason
for this is that there is already a lock for the setting because it is
being edited by another user or process.

System Response

You cannot save the changed setting under the same name. You have to
select a new technical name when saving it.
The changed setting can still be executed, as the setting can be
executed without being saved.

How to fix this error?

There might still be locks on the SAP BW server even though the setting
is no longer being edited. Ask the system administrator to delete these
locks for you (lock object E_RSRD_SETTING, table name RSRD_SETTING).
Locks are deleted automatically after a certain amount of time,
depending on the system settings.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.