Git refusing to merge unrelated histories on rebase

Error:

During git rebase origin/development the following error message is shown from Git:

fatal: refusing to merge unrelated histories
Error redoing merge 1234deadbeef1234deadbeef

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

The "refusing to merge unrelated histories" error occurs when you're trying to merge or rebase two branches that don't have a common ancestor commit. Git considers them as unrelated histories and wants to ensure that you're intentionally merging or rebasing them.

To resolve this error, you can try the following steps:

Ensure that you're in the correct branch where you want to apply the merge or rebase.

Use the --allow-unrelated-histories flag to force the merge or rebase operation, indicating that you're aware of the unrelated histories. For example:

git merge branch-name --allow-unrelated-histories

or

git rebase branch-name --allow-unrelated-histories

Replace branch-name with the actual branch name you want to merge or rebase.

Resolve any conflicts that arise during the merge or rebase process.

Keep in mind that forcing the merge or rebase of unrelated histories should be done with caution, as it can lead to unexpected results. Ensure that you understand the implications and consequences of merging or rebasing unrelated branches before proceeding.