Oracle Message ORA-22919 - dangling REF error or lock object failed for no wait request

ERRORdangling REF error or lock object failed for no wait request
CAUSEThe error could be one of the following. The object corresponding to the REF does not exist or the object was locked by another user and the lock with nowait request failed.
ACTIONEnsure that the REF value is pointing to an existing object or issue a lock request without the nowait option.