Sorry I did not answer this sooner but just stumbled upon this forum.
Regarding the message:
(FOC1567) CREATE SYNONYM: DATASOURCE ‘TB_USER_RQ_INFO’ IS NOT UNIQUE
Its nothing to do with whether or not its a a Unique index – its the NAME of the index that is not unique. So say you have an index named this:
If you look under System i Navigator in the list of constraints in your schema, I bet you have a constraint with the same name:
Rename either one and the problem goes away.