zk 在设置节点值时报错 org.apache.commons.cli.UnrecognizedOptionException: Unrecognized option: -1

[zk: www.abc.com:4888(CONNECTED) 33] set /path/1/point -1
org.apache.commons.cli.UnrecognizedOptionException: Unrecognized option: -1
哪位哥们知道为啥报这错 ？
当设置：set /path/1/point 12345时没有问题

给-1加上引号试试