What does Git push non-fast-forward updates were rejected mean

Question

I m using Git to manage my two computers and my development  I m trying to commit changes to GitHub  and I got this error   Failed to push some refs to  lt repo gt   To prevent you from losing history  non-fast-forward updates were rejected  Merge remote changes before pushing again   What could be causing this  and how can I fix this  EDIT  Pulling the repo returns the following    branch    master- gt master  non-fast-forward  Already-up-to-date  Pushing still gives me the aforementioned error

User · Answer

A fast-forward update is where the only changes one one side are after the most recent commit on the other side  so there doesn t need to be any merging   This is saying that you need to merge your changes before you can push

User · Answer

Never do a git -f to do push as it can result in later disastrous consequences   You just need to do a git pull of your local branch   Ex   git pull origin  your local branch    and then do a git push

User · Answer

It means that there have been other commits pushed to the remote repository that differ from your commits  You can usually solve this with a   git pull   before you push  Ultimately   fast-forward  means that the commits can be applied directly on top of the working tree without requiring a merge

User · Answer

you might want to use force with push operation in this case  git push origin master --force

User · Answer

You need to merge and resolve the conflicts locally before you push your changes to remote repo fork    1  pull  fetch and merge      git pull remote branch    2  Push the changes    git push remote branch    Still you have a quick choice to push forcibly by using --force option but should be avoided as it may result in changes loss or affect badly on other contributors

User · Answer

GitHub has a nice section called  Dealing with    non-fast-forward    errors      This error can be a bit overwhelming at first  do not fear    Simply put  git cannot make the change on the remote without losing commits  so it refuses the push    Usually this is caused by another user pushing to the same branch  You can remedy this by fetching and merging the remote branch  or using pull to perform both at once       In other cases this error is a result of destructive changes made locally by using commands like git commit --amend or git rebase    While you can override the remote by adding --force to the push command  you should only do so if you are absolutely certain this is what you want to do    Force-pushes can cause issues for other users that have fetched the remote branch  and is considered bad practice  When in doubt  don   t force-push      Git cannot make changes on the remote like a fast-forward merge  which a Visual Git Reference illustrates like     This is not exactly your case  but helps to see what  fast-forward  is  where the HEAD of a branch is simply moved to a new more recent commit      The  branch master- gt master  non-fast-forward  Already-up-to-date  is usually for local branches which don t track their remote counter-part  See for instance this SO question  git pull says up-to-date but git push rejects non-fast forward   Or the two branches are connected  but in disagreement with their respective history  See  Never-ending GIT story - what am I doing wrong here       This means that your subversion branch and your remote git master branch do not agree on something    Some change was pushed committed to one that is not in the other    Fire up gitk --all  and it should give you a clue as to what went wrong - look for  forks  in the history

User · Answer

In my case for exact same error  I was also not the only developer  So I went to commit  amp  push my changes at same time  seen at bottom of the Commit dialog popup      but I made the huge mistake of forgetting to hit the Fetch button to see if I have latest  which I did not  The commit successfully executed  however not the push  but instead gives the same mentioned error     even though other developers didn t alter same files as me  I cannot pull latest as same error is presented  The GUI Solution Most of the time I prefer sticking with Sourcetree s GUI  Graphical User Interface   This solution might not be ideal  however this is what got things going again for me without worrying that I may lose my changes or compromise more recent updates from other developers  STEP 1 Right-click on the commit right before yours to undo your locally committed changes and select Reset current branch to this commit like so   STEP 2 Once all the loading spinners disappear and Sourcetree is done loading the previous commit  at the top-left of window  click on Pull button        then a dialog popup will appear  and click the OK button at bottom-right   STEP 3 After pulling latest  if you do not get any errors  skip to STEP 4  next step below   Otherwise if you discover any merge conflicts at this point  like I did with my Web config file      then click on the Stash button at the top  a dialog popup will appear and you will need to write a Descriptive-name-of-your-changes  then click the OK button      once Sourcetree is done stashing your altered file s   repeat actions in STEP 2  previous step above   and then your local files will have latest changes  Now your changes can be reapplied by opening your STASHES seen at bottom of Sourcetree left column  use the arrow to expand your stashes  then right-click to choose Apply Stash  Descriptive-name-of-your-changes   and after select OK button in dialog popup that appears    IF you have any Merge Conflict s  right now  go to your preferred text-editor  like Visual Studio Code  and in the affected files select the Accept Incoming Change link  then save   Then back to Sourcetree  click on the Commit button at top   then right-click on the conflicted file s   and under Resolve Conflicts select the Mark Resolved option   STEP 4 Finally    We are now able to commit our file s   also checkmark the Push changes immediately to origin option before clicking the Commit button   P S  while writing this  a commit was submitted by another developer right before I got to commit  so had to pretty much repeat steps

[git] What does "Git push non-fast-forward updates were rejected" mean?

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