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Valheim Incompatible Version Fix

Valheim Guide • Updated Mar 18, 2026

Valheim "Incompatible Version" Fix After Updates

If your Valheim dedicated server appears in the browser but players get "Incompatible Version", the world is usually fine. The real issue is that the game client and the dedicated server app are on different builds, or a leftover BepInEx/plugin stack is still targeting an older version.

Most Common Reasons

  • The client updated, but the dedicated server app did not.
  • The server is on a beta or public test branch while players are on stable, or the reverse.
  • BepInEx plugins are stale after a game update.
  • Steam/SteamCMD reported success but the actual server binary stayed old.
  • Crossplay sessions are hanging during rollout after a major patch.

Fix Order

  1. Stop the server fully.
  2. Update the dedicated server app, not just the client.
  3. Confirm the server and client are on the same branch.
  4. Temporarily remove or disable BepInEx plugins to test clean.
  5. Restart and recheck before touching world files.

Check Your Launch Arguments

Valheim is configured through launch arguments, so keep the important ones aligned with the build you intend to run:

-name "My Valheim Server"
-world "Dedicated"
-password "YourPassword"
-public 1
-crossplay

If you use a beta branch during updates, make sure every player is on that same branch. A stable client cannot join a beta server and a beta client cannot join a stable server cleanly.

Symptom Likely Fix
Browser entry exists but join fails immediately Dedicated server app needs update or branch alignment
Only modded players fail Disable stale BepInEx plugins and retest
Problem started after a big patch Fully restart Steam or SteamCMD and force a clean update

Do not restore backups first. Version mismatch errors are rarely caused by damaged world files. Fix the software stack first, then test the existing world again.

Need a simpler update path for crossplay and modded worlds? Run Valheim on Supercraft and avoid manual dedicated-server app drift after patches.

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