Transport Workflow active; do not make manual imports

What causes this issue?

When you configured your system landscape you decided to use the
Transport Workflow for imports into this system. Only make manual
imports in exceptional cases.

System Response

The TMS terminates the first import to make sure that you are not
importing manually by mistake.

How to fix this error?

It is up to you to make sure that you are not importing requests that
are already in the Transport Workflow.
If you still want to import manually, proceed as follows:
Confirm the dialog box informing you that imports into this system are
made with the Transport Workflow. The import queue appears.
Choose <LS>Import request</>. The dialog box appears again.
Confirm the dialog box again. The dialog box <LS>Import transport
request</>.
Choose the appropriate options and start the import with <LS>Continue
</>.

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

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.