Query &1 deleted already

What causes this issue?

You want to delete a query that you deleted already in a parallel mode.
The query no longer exists.

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?

Start the transaction again to display the current queries.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.