idea git merge refusing to merge unrelated histories

If you encounter the "refusing to merge unrelated histories" error when trying to merge branches in Git, it typically means that Git is unable to automatically merge the branches because it cannot find a common ancestor commit.

To resolve this issue, you can use the `--allow-unrelated-histories` flag with the `git merge` command. Here are the steps to follow:

1. Make sure you are in the branch where you want to merge the other branch.

   git checkout <branch-name>

2. Merge the other branch with the `--allow-unrelated-histories` flag.

   git merge <other-branch-name> --allow-unrelated-histories

3. Resolve any conflicts that may arise during the merge process.
Git will automatically attempt to merge the changes but if conflicts occur, you need to manually resolve them.

4. Commit the merge changes.

   git commit -m "Merge branches"

After following these steps, the branches should be successfully merged despite having unrelated histories.