Oh well, how to fix something that shouldn't need fixing if you decide that D&D24 shouldn't be available on the compendium of your D&E14 game, and or you have more stuff in your compendium that is 3rd party: 1 . Keep it as it is 2. If you don't keep it as it is, then you will have to kick or ask your players to leave the game, and reinstate them. 3. If your players have the new compendium interface they will never ever see anything that isn't WoTC, ask them to turn it back to Legacy. 4. Save yourself the trouble, don't use Roll20 pro, use it free: - you already use discord or other stuff for voice and video, because roll20's sucks - you already use other platforms for music ambient, because roll20's sucks - the API crashes 3 out of 5 times, and there's one or two scripts that are actually useful. - pro gives you more storage space, do you actually need it? - and finally, of you ever get an issue, you will be fixing it yourself, because you are paying for a storage space and a bunch of stuff that you don't actually use and when you do they don't WORK PROPERLY.