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Project Zomboid Workshop Item Version Is Different Fix

Project Zomboid Guide • Updated Mar 18, 2026

Project Zomboid "Workshop Item Version Is Different" Fix

This is one of the most common Project Zomboid dedicated server mod failures. A client updates a Workshop mod before the server restarts, or the server loads a mod list that no longer matches the actual cached files. The result is the message: "Workshop item version is different than the server's."

The key point: this is often a timing problem, not a total modpack failure. Steam updates the client first, but the server may still be serving the previous mod version until its next restart.

Check These Fields in servertest.ini

Mods=ModA;ModB;ModC
WorkshopItems=123456789;234567890;345678901
Map=Muldraugh, KY

If even one Workshop ID is stale, duplicated, or missing its matching Mods= entry, the mismatch gets much harder to clear cleanly.

Fastest Recovery Path

  1. Restart the server so it pulls the latest Workshop versions.
  2. Verify the WorkshopItems and Mods lists still match the intended pack.
  3. Have affected players clear their cached version of the broken mod.
  4. If a map mod updated, confirm the server's map load order is still valid.
  5. Temporarily disable the single recently updated mod if the error persists.
Cause What to Do
Client updated before server restart Restart server first, then let players reconnect
Bad Workshop ID or removed mod Clean WorkshopItems and Mods lists
Map mod changed unexpectedly Validate map order before launching the save again
Only one player is affected Clear local cached mod data on that client

Why This Keeps Happening

Project Zomboid depends on Steam Workshop distribution, which means the client and server are both subject to automatic updates. The cleanest admin habit is to restart the server after mod updates before letting players connect again.

Admin rule: when players report this right after a mod update, do not wipe the whole world first. Restart the server, validate the mod IDs, and isolate the changed Workshop item before taking more destructive steps.

Need an easier restart-and-rollback path for modded Zomboid? Run Project Zomboid on Supercraft and keep Workshop mismatches easier to recover from.

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