1-14_to_1-17.zip Guide

: Moving from 1.14 directly to 1.17 often creates "cliffs" or harsh borders between old explored terrain and new 1.17 terrain.

: Skipping 1.15 and 1.16 can sometimes cause data loss in player inventories or entity data. 1-14_to_1-17.zip

Is this a you downloaded, or a backup of your own server? : Moving from 1

Are there included in the ZIP, or is it purely a vanilla world? Are you seeing any specific errors when you try to open it? 1-14_to_1-17.zip

: Travel to a new area in the Nether to ensure the 1.16 biomes are generating correctly. To give you a more accurate review, could you tell me:

Updating a world or server across these versions is a massive jump in game logic and world generation.