Another session already exists with global debugging scope for user &1

What causes this issue?

There is already another logon session active, which has system-wide
debugging scope for user &V1&.

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?

You should select a local debugging scope so that you not interfere with
actions of the other logon session. If you continue, then there can be
unpredictable behavior and debugging may not work as you expect.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.