Request lock on nonexistent task/request &

What causes this issue?

The request locks on the object &V2& cannot be edited because the object
is locked by request/task &V1&.
The request/task &V1& no longer exists.

System Response

The function terminates.

How to fix this error?

Repeat your function.
If the the error occurs again, notify your system administrator.

Procedure for System Administrators

The illegal locks have to be removed (table TLOCK). See also SAP Note
999668.

Error message extract from SAP system. Copyright SAP SE.