Lore check-in always fails with "rehashing commit ... (os error 2)" - repository has duplicate folder nodes, no successful check-in since Sep 1

General Issues and Bug Reporting
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1

Summary

Lore check-in always fails with “rehashing commit … (os error 2)” - repository has duplicate folder nodes, no successful check-in since Sep 1

Please select what you are reporting on:

Unreal Editor for Fortnite

What Type of Bug are you experiencing?

Lore

Steps to Reproduce

  1. Open my project PansPracticeMap7.
  2. Click Check In.
  3. Lore creates an automatic backup commit on my personal branch, then the merge into main fails.

Expected Result

Check-in succeeds and main gets my current project state.

Observed Result

Check-in fails every time with:

rehashing commit: The system cannot find the file specified. (os error 2)
at lore-storage\src\error.rs:7 - open file: …\Content\KavookS\T_KS_Gi_Speed.uasset
at lore-revision\src\immutable.rs:417 - writing immutable content from file
at lore-revision\src\commit.rs:1951 - Failed writing file Content/KavookS/T_KS_Gi_Speed.uasset to immutable store
at lore-revision\src\branch\merge.rs:3864 - rehashing commit

Details:

  • Last successful check-in to main: revision 905, Sep 1 2026.
  • Since then 39 automatic backup commits (revisions 906-944) piled up on my personal branch and never merged into main.
  • About 3,890 files were deleted from disk after those backups. The merge still tries to read them from disk and aborts on the first missing one.
  • “lore repository verify state” reports “Multiple nodes have identical name” for 23 folders (e.g. Content/ExternalActors, Content/Meshes, Content/UIse, Content/PieceSection, Content/EditSystem, Content/Assets_1v1).
  • 3,048 of the deleted files are inside those duplicated folders. “lore stage ” fails for them with “Invalid path”, so I cannot register the deletions.
  • After the failed check-in, the project got stuck at “OpenProject_ConnectRevisionControl - Begin” on open. “lore status --reset” fixed the opening, but check-in still fails.
  • This looks like FORT-1155571 (thread “Lore checkout error”, marked fixed for 43.00 / 44.20). I am on 42.40 (CL 59343437), Lore client 0.8.6-nightly+338_3666.

I need check-in working to share the project with a team member. My local files are complete (I have a full backup). Could someone repair the duplicated folder nodes on the server side, or tell me a safe way to make my current local state the new main revision without losing the link to my published island?

Thanks!

Platform(s)

windows

Island Code

3916-5715-6958

Additional Notes

The project opens and publishes normally; only check-in is broken. I can provide full Lore.log and editor logs if needed. Please do not suggest Revert / Sync Latest, since that would overwrite my current local work.

2
  • Close uefn
  • Open the project folder (in windows explorer)
  • Delete .lore (or .urc) folder (move it to another location as a backup)
  • Reopen the project in UEFN (might take a while)
  • Try again check in changes

Could you let us know if this works?

3

Thanks for the help! I tried that (moving the .lore folder out and reopening), but instead of fixing the check-in, UEFN started syncing to latest from the server. The last real check-in of this project on the server is from Sep 1 (rev 905), so it started overwriting my current local map with that old version (4,315 files downloaded, 1,228 replaced). I stopped it and restored everything from a backup. The same fix worked on another project where the server was up to date.
Is there a way to rebuild/reconnect the local repository WITHOUT syncing from the server, so my current local files become the new revision? Or could you repair the repository on your side? The check-in fails with “rehashing commit … os error 2” and “Invalid path” (the repo seems to have duplicate folder nodes).