git branch -d gives warning

Question

Just want to get a better understanding of the warning message after I deleted a local branch

warning: deleting branch \'old_branch\' that ha

Answer 1

This is just warning you that you have changes pushed to the branch on origin, but they are not merged into master, so you are only deleting it locally.

It is warning you that you no longer have a local copy of that branch, but it exists in origin

If you want to delete the remote branch as well, use git push --delete origin old_branch