Convert sub-library to regular library

I just upgraded from Seafile server 4.1.2 to 6.x, going through the recommended upgrade steps of running all of the upgrade scripts as I went. This went fine, but after the fact I learned that in 5.x, Sub-libraries were removed. I still have a bunch of sublibraries which still seem to work, so far as I can tell [please advise if this is the case!], but don’t exactly feel like first-class citizens anymore. Is there/what is the recommended way to convert these sublibraries into standard libraries? Ideally I’d love to be able to keep the history as it pertains to each individual library and/or have my users continue to sync as they currently have setup, but I fully understand if the only answer is “burn it all to the ground and start over again” - I just want to know if that’s the only solution or not before I go about that.