"Please note that once you convert a personal journal to an asylum, you cannot change it back. Before proceeding to the next step, make sure that the journal (for your new asylum) has no journal entries." From the FAQs. I'd guess it either erases them or just won't work.
My suggestion would be to create a new asylum, x-post all your old entries (post a preview of the icons, then a fake-cut back to the old journal? or just repost the entry in its entirety?) Repost your resource post, and on the old post, edit it so that it links to the new one?