The activity for &1 &2 was cancelled

What causes this issue?

The current action (copy, replace, delete or transport org. object &V1&
&V2&) was canceled manually.

System Response

The action has been canceled.

How to fix this error?

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.