How to stop/terminate the job 'Modify NTP Server' on VNXe3200

Yesterday, I want to modify the NTP configuration to set NTP Server on my VNXe3200. But I lost the connect during the operation. After I re-login with Unisphere, I had finished the Disk Firmware upgrading, although the procedure is very slow. And when I want upgrade the Software Version from 3.1.8 to 3.1.15, I could upload the new version, but the step "Install Candidate Version" failed due to the unfinished job "Modify NTP Server", which couldn't be canceled.

Is there any safe mothed to kill the "Modify NTP Server" job ?

Thanks in advanced !