Solved : you have not concluded your merge (merge_head exists)

If you are getting an error "you have not concluded your merge (merge_head exists)" in the source tree(Git) while doing a pull request, the problem can be your previous pull failed to merge automatically.

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There can be multiple scenarios in which you do face error "you have not concluded your merge (merge_head exists)". So there are numerous possibilities of the solution, depending on how you got there. 

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

if you run command, git status you get below result.

nothing to commit (working directory clean)

Cause / Reason of Problem: Pull request failed to merge automatically.

Solution :

1.	Undo the merge of Pull Request which was failed Use Commands: Git merge --abort (Command works on version 1.7.4 and higher) Git reset --merge (Command works prior to version 1.7.4)
2.	Now, Do pull request
3.	If you get conflict, resolve it and Commit it
4.	Take a pull again and it should work

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There are numerous solutions available over Stack Overflow, Quora, etc sites about solving error message "you have not concluded your merge (merge_head exists)". But before you start taking any steps towards a solution, please first follow below mentioned steps.

1. Check if you have any uncommitted changes in "File Status", If you have then either stash it or Discard/Remove it after taking a backup from the physical location.

2. You might see a conflict of files with conflict comment in commit section, If these files are not relevant to your changes the simply remove the comment and discard the files.