Request &1 is already being processed

What causes this issue?

You want to generate a new DTP request using data transfer process
&v2&. However, request &V1& for this data transfer process is
currently being loaded or deleted.

System Response

The request cannot be generated.

How to fix this error?

Wait until the system has finished processing request &v1&.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.