我创建了Rails的应用程序，当我运行命令mysql.server start时，发生错误
Starting MySQL
.....................[...]
ERROR! The server quit without updating PID file
(/usr/local/var/mysql/XXXnoMBP.pid).
我运行命令mysql_config --socket，因此返回了/tmp/mysql.sock。
接下来我运行sudo rm -rf /tmp/mysql.sock并输入密码，所以
==> Tapping homebrew/services
Cloning into '/usr/local/Homebrew/Library/Taps/homebrew/homebrew-services'...
remote: Counting objects: 12, done.
remote: Compressing objects: 100% (8/8), done.
remote: Total 12 (delta 0), reused 7 (delta 0), pack-reused 0
Unpacking objects: 100% (12/12), done.
Tapped 0 formulae (40 files, 54.2KB)
Error: File exists - /Users/myname/Library/LaunchAgents
被返回，第三次我运行brew services restart mysql所以错误：文件存在 - / Users / myname / Library / LaunchAgents被返回。我的代码出了什么问题？我该如何解决这个问题？