error: The branch BRANCH is not fully merged.

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If you have any questions about the content on this page, don't hesitate to open a new ticket and we'll do our best to assist you.

Example:

$ git branch -d BRANCH
error: The branch 'BRANCH' is not fully merged.
If you are sure you want to delete it, run 'git branch -D BRANCH'.

If you are sure that the branch is actually fully merged, check that you are on the branch in which the BRANCH to delete has been merged into. If BRANCH has been merge into master and you are on another, older feature branch, checkout master and try deleting again.