&1 is not a workbench request or customizing request

What causes this issue?

You need to specify a Workbench or Customizing request for this
function.
You cannot use tasks, transports of copies, or relocations here.

System Response

The function terminates.

How to fix this error?

Check your entry, correct it if necessary, and repeat the function.

Error message extract from SAP system. Copyright SAP SE.