To upgrade your Terraria server to 1.14 you can do one of the following:
- Change your server version under startup parameters to 1401 and then select reinstall. Due to all the changes we also recommend changing the world name and generating a new map.
- Open a support ticket and we will be happy to upgrade your server for you.
You Must Be Using Vanilla Terraria as Modded servers do not yet support 1.14