Force Merge Unrelated Histories

 Hi, I have created a git repository named Animals, In that default branch is main. But I have started developing in master branch and pushed all the changes in master branch.

Now, main branch is empty or it has only ReadMe.md file.

Now, I wants to have everything in main branch whatever present in master branch.

In my terminal, I moved to main repository using "git checkout main" and used "git merge master"

Now, I am facing an issue that Unrelated Histories, what should I do now?

Run this command from your main branch:

git merge master --allow-unrelated-histories

This tells Git:

“Yes, I know these branches don’t share a common ancestor — merge anyway.”

Why This Happens:

• You may have created main and master separately (e.g., cloned, then created a new branch).
• Git normally expects branches to share a common commit history.

After the Merge:

• Resolve any merge conflicts if prompted.
• Commit the merge.
• Push main to remote:

                    git push origin main