Switching to an eBook's new edition

I once obtained a free Kobo book for my library. Now, I would like to read the updated version. I have tried removing it from the library and then re-requesting it (but, this time, the more current edition). But when it is placed back into my library, it is the same original edition. Apparently, even when I remove it from my library, info about the original edition is still being stored for me, somewhere, in case I ever want it again.

Any ideas on how I can get the more up-to-date version instead?