Oracle Solution for Error ora-23535

ORA-23535: instantiating templates from multiple back ends is not allowed.

What triggered the Error:

attempt was made to set a new non-null back end database for an iAS site.

What should we do to fix it:

ll dbms_ias_configure.set_back_end_db procedure with null dblink. Then, call the same procedure with the new non-null dblink.