Terraria Error Code terraria-mismatch: How to Fix It

Easy 5-20 minutes Medium Severity Verified June 2026
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Error Code
terraria-mismatch
Brand
Popular Games
Product Type
game
Severity
Medium
DIY Difficulty
Easy
Estimated Fix Time
5-20 minutes
The Terraria 'mismatch' error occurs when the version of Terraria running on your game client does not match the version running on the server you are trying to join. This is a very common multiplayer issue that usually happens after a game update rolls out and either the server or your local copy hasn't been updated yet. The good news is that this error is almost always fixable without any technical expertise by making sure both sides are running the exact same game version.
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Tools You'll Need

How to Fix Error Code terraria-mismatch

  1. Check Your Current Terraria Version

  2. Update Terraria via Steam or GOG

  3. Verify Game File Integrity (Steam Only)

  4. Ask the Server Host to Update Their Server

  5. Downgrade Your Terraria Client to Match the Server (Advanced)

    Back up your Terraria save files before downgrading. Your save data is usually found in Documents/My Games/Terraria. Downgrading can occasionally cause world or character file incompatibilities.

  6. Check for tModLoader Version Conflicts

  7. Disable VPNs and Check Firewall Settings

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When to Call a Professional

This error almost never requires professional help. However, if you are the server administrator and the mismatch persists after updating both the server software and the client, consider reaching out to the official Terraria support forums at forums.terraria.org or the Re-Logic support team. If the error appears on a rented dedicated server (such as through Nitrado or similar hosting providers), contact that host's technical support to request a server-side game version update.

Frequently Asked Questions

What does the Terraria mismatch error mean?
The Terraria mismatch error means the version of the game you are running on your computer is different from the version the multiplayer server is running. For two players to connect, both must be on the exact same game version. This often happens right after Re-Logic releases a game update.
How do I fix Terraria version mismatch on Steam?
Open Steam, go to your Library, right-click Terraria, and select 'Properties'. Under the 'Updates' tab, enable automatic updates and apply any pending update. Then go to 'Local Files' and click 'Verify integrity of game files' to make sure everything is installed correctly. Relaunch the game and try connecting again.
Can I play Terraria on an older version to join a friend's server?
Yes. On Steam, you can access older Terraria versions through the 'Betas' tab in the game's Properties menu. Select the version your friend's server is running from the dropdown. Just make sure to back up your save files first, since downgrading can sometimes cause compatibility issues with existing worlds or characters.
Why do I get a mismatch error in tModLoader?
tModLoader (the Terraria mod platform) has its own version number separate from the base game. If you and the server are running different versions of tModLoader, you will get a mismatch error even if your base Terraria versions match. Make sure both you and the server host are running the identical version of tModLoader by updating through Steam.
Does the Terraria mismatch error affect single-player mode?
No. The mismatch error only occurs in multiplayer because it is caused by a conflict between your game client and a remote server. Single-player mode runs entirely on your local machine, so version differences with other players or servers have no effect on solo gameplay.

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