Warning: lsws.service changed on disk. Run 'systemctl daemon-reload' to reload units.

After I upgraded OpenLiteSpeen, I could not restart lsws again. Please help me.
Log:
[root@server ~]# systemctl restart lsws
Warning: lsws.service changed on disk. Run ‘systemctl daemon-reload’ to reload units.
Job for lsws.service failed because the control process exited with error code. See “systemctl status lsws.service” and “journalctl -xe” for details.
[root@server ~]#