% git pull origin my_yellow_branch
From https://github.com/user/myrepo
* branch my_yellow_branch
-> FETCH_HEAD
% git checkout my_yellow_branch
% git merge my_green_branch
fatal: refusing to merge unrelated histories
Reason for the error?
This error occurs when you try to merge two branches that do not share a common ancestor. This would usually happens when you try to merge a branch that was created independently of the branch you are currently on.
Here in the above example we have two branches, my_yellow_branch and my_green_branch, and we are trying to merge my_green_branch into my_yellow_branch. However, my_yellow_branch was created independently and does not have a common ancestor with my_green_branch.
How to fix the error?
Make use of the option (flag) --allow-unrelated-histories
To fix this error, you can use the --allow-unrelated-histories flag when performing a git merge.Using this flag git allows to merge two branches even when they do not have a common ancestor.
Examples:% git checkout my_yellow_branch
% git merge --allow-unrelated-histories branch_to_merge
% git commit -m "Fix: Merged unrelated histories"
% git push origin my_yellow_branch
Reference:
https://git-scm.com/docs/git-merge#Documentation/git-merge.txt---allow-unrelated-historiesFacing issues? Have Questions? Post them here! I am happy to answer!
Rakesh (He/Him) has over 14+ years of experience in Web and Application development. He is the author of insightful How-To articles for Code2care.
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