Git: Merge a Commit into a different Branch

Question

So I have 3 branches;

• develop - my continued development branch
• version_1 - a release branch
• version_2

Answer 1

Merging only one or a few commits mean using git cherry-pick

First cancel the merge you just did: see "Undo a Git merge?".
Then:

git checkout version_1
git cherry-pick 

That can apply to multiple commits or a range of commits: see "How to cherry pick a range of commits and merge into another branch".