Naturalist Mod Server Setup and Multiplayer Checklist
Multiplayer adds one more compatibility layer: every player is connecting to a server that has its own Minecraft version, loader, mod list and world data. A Naturalist server setup works best when those layers are documented before launch.

Freeze the target versions
Choose the Minecraft version and loader first. Then select the Naturalist release that matches. Avoid updating only one layer on a live server; coordinated changes are easier to troubleshoot and roll back.
Back up the full world
Before adding or removing an entity-focused mod, copy the world folder and important configuration files while the server is stopped. Verify the backup can be found and restored rather than assuming an automated job completed.
Keep client and server builds aligned
Players should use a compatible Naturalist version and matching loader environment. If a server expects modded registries or entities that a client lacks, connection or world behavior can fail.
Stage the rollout
Test a copy of the server world with a small group or local instance. Watch startup logs and normal gameplay before promoting the change to the main server. This catches version or dependency errors without a public outage.
Document the working set
Keep a text list of Minecraft version, Java version, loader version, Naturalist filename and other required mods. That list becomes the fastest recovery path when a player reports a mismatch months later.