Git refusing to merge unrelated histories on rebase

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Top 5 Answer for Git refusing to merge unrelated histories on rebase

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The default behavior has changed since Git 2.9:

"git merge" used to allow merging two branches that have no common base by default, which led to a brand new history of an existing project created and then get pulled by an unsuspecting maintainer, which allowed an unnecessary parallel history merged into the existing project. The command has been taught not to allow this by default, with an escape hatch --allow-unrelated-histories option to be used in a rare event that merges histories of two projects that started their lives independently.

See the Git release changelog for more information.

You can use --allow-unrelated-histories to force the merge to happen.

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In my case, the error was just fatal: refusing to merge unrelated histories on every try, especially the first pull request after remotely adding a Git repository.

Using the --allow-unrelated-histories flag worked with a pull request in this way:

git pull origin branchname --allow-unrelated-histories 

As per 2.9.0 release notes - git pull has been taught to pass the --allow-unrelated-histories option to underlying git merge

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Try the following command:

git pull origin master --allow-unrelated-histories 

This should solve your problem.

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I got this error when I set up a local repository first. Then I went to GitHub and created a new repository. Then I ran

git remote add origin <repository url> 

When I tried to push or pull, I got the same fatal: unrelated_histories error every time.

Here is how I fixed it:

git pull origin master --allow-unrelated-histories git merge origin origin/master ... add and commit here... git push origin master 
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For this, enter the command:

git pull origin branchname --allow-unrelated-histories 

For example,

git pull origin master --allow-unrelated-histories 


GitHub unrelated histories issue

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