Destro conduits

I just change from main spec for my lock , I went from aff to destro and I notice that the suggestion i get for conduits is always for aff no matter what change i do, is there anything I can do to fix this?

I would need you to post a snapshot to help you out.

Most likely you still have Affliction set as your highest priority spec, so the soulbinds are being optimized for that spec instead.