Oracle Solution for Error ora-04051

ORA-04051: user string cannot use database link string.string

What triggered the Error:

During 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.

What should we do to fix it:

Change your database link structure so that all indirect remote accesses are done from the same userid that originates the request.