Error map

index.lock exists fatal: Unable to create '.git/index.lock': File exists. Another git process seems to be running in this repository

Git · layer 7, Build & delivery

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2 · Network 4 · Application & API 5 · Data 6 · Platform & cloud 7 · Build & delivery
index.lock exists — fatal: Unable to create '.git/index.lock': File exists. Another git process seems to be running in this repository (Git)index.lock …unfinished merge — fatal: You have not concluded your merge (MERGE_HEAD exists). Please, commit your changes before you merge. (Git)unfinished mergerebase in progress — fatal: It seems that there is already a rebase-merge directory, and I wonder if you are in the middle of another rebase. (Git)rebase in progresscorrupt object — error: object file .git/objects/x is empty / fatal: loose object is corrupt (Git)corrupt objectunknown revision HEAD — fatal: ambiguous argument 'HEAD': unknown revision or path not in the working tree. (Git)unknown revision HE…branch exists — fatal: a branch named 'x' already exists (Git)branch existsgc warning — warning: There are too many unreachable loose objects; run 'git prune' to remove them. (Git)gc warningAuthentication failed — fatal: Authentication failed for 'https://github.com/x/y.git/' (Git)Authentication fail…CONFLICT — Git: CONFLICT (content): Merge conflict in file — Automatic merge failed (Git)CONFLICTchanges overwritten — error: Your local changes to the following files would be overwritten by merge (Git)changes overwrittennot possible to fast-forward — fatal: Not possible to fast-forward, aborting. (Git)not possible to fas…cannot rebase — error: cannot pull with rebase: You have unstaged changes. Please commit or stash them. (Git)cannot rebase126 incorrect key file — MySQL ERROR 126 (HY000): Incorrect key file for table; try to repair it (MySQL)126 incorrect key f…malformed database — sqlite3.DatabaseError: database disk image is malformed (SQL)malformed databasedetached HEAD — You are in 'detached HEAD' state. (Git)detached HEADuntracked files overwritten — error: The following untracked working tree files would be overwritten by checkout/merge (Git)untracked files ove…cannot lock ref — error: cannot lock ref 'refs/remotes/origin/x': is at … but expected … / unable to update local ref (Git)cannot lock refnon-fast-forward — Git: ! [rejected] … (fetch first) — error: failed to push some refs (Git)non-fast-forwardpathspec did not match — error: pathspec 'x' did not match any file(s) known to git (Git)pathspec did not ma…src refspec — error: src refspec main does not match any (Git)src refspec503 — HTTP 503 Service Unavailable (HTTP)503Maintenance mode — WordPress: Briefly unavailable for scheduled maintenance. Check back in a minute. (WordPress)Maintenance modepublickey — Git: Permission denied (publickey). fatal: Could not read from remote repository. (Git)publickeyAADSTS700016 — Azure AD (Entra ID): AADSTS700016 Application not found in the directory (Azure)AADSTS700016401 — HTTP 401 Unauthorized (HTTP)401

Directly related (7)

unfinished mergeGit

fatal: You have not concluded your merge (MERGE_HEAD exists). Please, commit your changes before you merge.

A merge is still in progress — conflicts were resolved (or not) but not committed.

rebase in progressGit

fatal: It seems that there is already a rebase-merge directory, and I wonder if you are in the middle of another rebase.

A previous rebase is still in progress (or was interrupted).

corrupt objectGit

error: object file .git/objects/x is empty / fatal: loose object is corrupt

The local Git object database is corrupted — usually after a crash, disk full or sync tool interference.

unknown revision HEADGit

fatal: ambiguous argument 'HEAD': unknown revision or path not in the working tree.

The repository has no commits yet (or the ref doesn’t exist), so HEAD can’t be resolved.

branch existsGit

fatal: a branch named 'x' already exists

You tried to create a branch whose name is already taken locally.

gc warningGit

warning: There are too many unreachable loose objects; run 'git prune' to remove them.

Git’s automatic garbage collection found many unreachable objects and is asking you to prune.

Authentication failedGit

fatal: Authentication failed for 'https://github.com/x/y.git/'

HTTPS authentication to the Git host failed — wrong or expired credentials, or a password used where a token is required.

Two steps away (17)

CONFLICTGit

Git: CONFLICT (content): Merge conflict in file — Automatic merge failed

Both branches changed the same lines; Git needs you to choose the final content before completing the merge/rebase.

changes overwrittenGit

error: Your local changes to the following files would be overwritten by merge

git pull/merge would modify files you’ve changed but not committed.

not possible to fast-forwardGit

fatal: Not possible to fast-forward, aborting.

pull is configured to fast-forward only, but your branch and the remote have diverged.

cannot rebaseGit

error: cannot pull with rebase: You have unstaged changes. Please commit or stash them.

A rebase (or pull --rebase) needs a clean working tree.

126 incorrect key fileMySQL

MySQL ERROR 126 (HY000): Incorrect key file for table; try to repair it

MySQL can’t use a table’s index file — usually a full tmp disk during a query, or MyISAM corruption.

malformed databaseSQL

sqlite3.DatabaseError: database disk image is malformed

The SQLite file is corrupted.

detached HEADGit

You are in 'detached HEAD' state.

HEAD points at a commit instead of a branch, so new commits won’t belong to any branch.

untracked files overwrittenGit

error: The following untracked working tree files would be overwritten by checkout/merge

Untracked local files have the same paths as files coming from the other branch.

cannot lock refGit

error: cannot lock ref 'refs/remotes/origin/x': is at … but expected … / unable to update local ref

Git couldn’t update a reference — stale remote-tracking refs, case-only branch name clashes, or a leftover lock file.

non-fast-forwardGit

Git: ! [rejected] … (fetch first) — error: failed to push some refs

The remote branch has commits you don’t have locally, so Git refuses to overwrite them. Pull (merge or rebase) first, then push.

pathspec did not matchGit

error: pathspec 'x' did not match any file(s) known to git

Git couldn’t find the file or branch name you referenced.

src refspecGit

error: src refspec main does not match any

You pushed a branch name that doesn’t exist locally — usually no commits yet, or the branch is called master not main.

503HTTP

HTTP 503 Service Unavailable

The server is temporarily unable to handle the request — overloaded, in maintenance, or has no healthy backends.

Maintenance modeWordPress

WordPress: Briefly unavailable for scheduled maintenance. Check back in a minute.

An update was interrupted and WordPress left its `.maintenance` file behind, so the site stays in maintenance mode.

publickeyGit

Git: Permission denied (publickey). fatal: Could not read from remote repository.

SSH authentication to GitHub/GitLab/Bitbucket failed — no key, wrong key, or the key isn’t added to your account.

AADSTS700016Azure

Azure AD (Entra ID): AADSTS700016 Application not found in the directory

The client ID in your sign-in request doesn’t exist in the tenant you’re authenticating against.

401HTTP

HTTP 401 Unauthorized

The request has no valid authentication credentials — you need to log in or send a valid token.

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