无法删除github上的main分支？

Question

我的github仓库，有master,main两个分支，我想删除远程的main分支

git push origin --delete main
报错

To https://github.com/accountname/repo.git
 ! [remote rejected] main (refusing to delete the current branch: refs/heads/main)
error: failed to push some refs to 'https://github.com/accountname/repo.git'

请问，如何解决？