Cascading of queues not possible

What causes this issue?

You attempted either to
Forward a <DS:GLOS.36E6A90191630344E10000009B38F982>queue</> that is
already the target of a forwarded queue

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

or
Forward to a queue that also forwards to a queue

System Response

How to fix this error?

Deactivate the forwarding of the source and target queue and execute
the action again.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.