Oracle Message ORA-04051 - user string cannot use database link string.string

ERRORuser string cannot use database link string.string
CAUSEDuring forwarding of a remote object access, an attempt was made to use a non-existent database link or one owned by a user other than the logon user or PUBLIC.
ACTIONChange your database link structure so that all indirect remote accesses are done from the same userid that originates the request.