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Valheim Incompatible Version – Fix Client & Server Mismatch

Quick answer: "Incompatible version" means client and server run different Valheim versions. Update server via SteamCMD (app_update 896660 validate), restart, wait 2–3 min – fixed in 90% of cases.

If you landed here: You see "Incompatible version" on join, friends can't connect or nothing works after a patch.

5-minute checklist

  1. Update Valheim on client (Steam library)
  2. Stop server in panel
  3. SteamCMD update / reinstall in panel
  4. Restart server, wait 2–3 min
  5. Connect via IP:2456 directly
  6. Test without BepInEx/mods

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Frequently asked questions (FAQ)

Valheim incompatible version – what does it mean?
Client and dedicated server are not on the same game version. Usually after a Valheim patch: update server or downgrade client (not recommended).
How do I update Valheim dedicated server?
SteamCMD: app_update 896660 validate. Use panel reinstall/update or run SteamCMD manually. Restart server after.
Do mods cause incompatible version?
Yes – BepInEx and mods must match server version. Update mods after patch or test without mods.

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