I have previously installed node 1.33.0, and now I've upgraded my node to 1.35.0. I already have a 'db' folder when I'm using 1.33.0. If I want to switch to Preview / Pre Production configuration and environment, should I create a separate 'db' folder and download the full blockchain from the beginning, or can I use my previous 'db' folder from the Legacy Testnet? Will it cause any conflict?

1 Answer 1


First, you need to upgrade to 1.35.3 for Preview or Preprod. You will need the new configuration files for Preview or Preprod (https://book.world.dev.cardano.org/environments.html), and you need to delete the db folder and sync from scratch (which is very fast now, as the blockchains are small).

  • Thank you. I have follow-up questions: 1. Are there any binary or executables that are ready to download for MacOS, so I don't have to build using Nix? 2. What is the difference between Preview and Preprod? I read it here that the Preprod is still on Alonzo and not Plutus V2 updated Aug 25, 2022 at 10:41
  • I don't know if you can find the binaries for MacOS. The difference in explained in the link I gave you in the answer. And correct, preview is forked, preprod still in Alonzo. Aug 25, 2022 at 10:44

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